cpp: pointer

 VS 2022 C++有两种注释方法，一种C++的，还有一种和C#差不多。

读写文件有生成有报错，文件头行加上这行代码

#define _CRT_SECURE_NO_WARNINGS

自定义数据结构数组指针，类对象指针，不熟，瞎摸象，我不知道赋值，调用......

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/*****************************************************************//**  * \file   geovindu.h  * \brief  业务操作方法  *  * \author geovindu,Geovin Du  * \date   2023-04-05 ***********************************************************************/ /* * 注释插件 https://www.doxygen.nl/download.html https://computingonplains.wordpress.com/doxygen-and-visual-studio/ https://marketplace.visualstudio.com/items?itemName=sergeb.GhostDoc https://marketplace.visualstudio.com/items?itemName=FinnGegenmantel.doxygenComments https://zh-google-styleguide.readthedocs.io/en/latest/google-cpp-styleguide/comments/       */   #ifndef GEOVINDU_H #define GEOVINDU_H #include <vector> // #include directive #include <string> #include <iostream> #include <string.h> #include <list> #include<iostream> #include<fstream> #include<stdio.h> #include<cstdlib> #include<cstring> #include<iomanip> #include <vector> #include <memory>           //#include <sqlite3.h> #include "PigInfo.h" #include "PigNameInfo.h" #include "CinemaScore.h" #include "OpenDoor.h" #include "LeapYear.h" #include "RandomlySampled.h" #include "NumberLottery.h"  #include "InputNumberMax.h" #include "DeskKnock.h" #include "NarcissisticNumber.h" #include "NarcissisticInfo.h" #include "NarcissisticList.h" #include "MultiplicationTables.h" #include "CardinalDirection.h" #include "CSVfilemanagement.h" #include "ATMdemo.h" #include "csvstream.h" //#include "csvparser.h" #include "StudentArry.h" #include "student.h" #include "StudentMenu.h" #include "StudentList.h"   //#include "GeovinStudent.h"       using namespace std;       /** * @brief 类库空间名 * geovindu edit * */ namespace geovindu {                 /**     * @brief 简要说明文字     */     enum class colors : short { red, blue, purple, azure };     /**     * @brief 简要说明文字     */     struct RGB     {         short r{ 0 };  // member initialization         short g{ 0 };         short b{ 0 };     };         /// <summary>    /// 信息    /// </summary>     struct GeovinStudent     {           /// <summary>         /// 姓名         /// </summary>         std::string studentName;         /// <summary>         /// 语文         /// </summary>         int chineseScore;         /// <summary>         /// 英语         /// </summary>         int englishScore;         /// <summary>         /// 数学         /// </summary>         int mathScore;         /// <summary>         ///         /// </summary>         int computerScore;         /// <summary>         /// 个人总分         /// </summary>         int studentTotalScore = chineseScore + englishScore + mathScore + computerScore; //计算 无效         /// <summary>         /// 平均         /// </summary>         int subjectAverage;         /// <summary>         /// 名次         /// </summary>         int rankingScore;           };         /// <summary>     /// 语文成绩排序，降  从大到小     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpChineseAsc(const GeovinStudent* a, const GeovinStudent* b)     {         return a->chineseScore > b->chineseScore;     }     /// <summary>     /// 语文成绩排序，升 从小到大     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpChineseDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->chineseScore < b->chineseScore;     }       /// <summary>     /// 英语成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpEnglishDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->englishScore > b->englishScore;     }     /// <summary>     /// 英语成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpEnglishAsc(GeovinStudent* a, GeovinStudent* b)     {         return a->englishScore < b->englishScore;     }       /// <summary>     /// 数学成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpMathDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->mathScore > b->mathScore;     }     /// <summary>     /// 数学成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpMathAsc(GeovinStudent* a, GeovinStudent* b)     {         return a->mathScore < b->mathScore;     }         /// <summary>     /// 计算机成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpComputerDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->computerScore > b->computerScore;     }     /// <summary>     /// 计算机成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpComputerAsc(GeovinStudent* a, GeovinStudent* b)     {         return a->computerScore < b->computerScore;     }       /// <summary>     /// 个人总分成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpTotalScoreDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->studentTotalScore > b->studentTotalScore;     }     /// <summary>     /// 个人总分成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpTotalScoreAsc(GeovinStudent* a, GeovinStudent* b)     {         return a->studentTotalScore < b->studentTotalScore;     }         // Function for comparing two students according     // to given rules           /// <summary>     ///     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool compareTwoStudentsPoointer(const GeovinStudent* a, const GeovinStudent* b)     {         // If total marks are not same then         // returns true for higher total         if (a->studentTotalScore != b->studentTotalScore)             return a->studentTotalScore > b->studentTotalScore;           // If marks in Maths are same then         // returns true for higher marks         if (a->chineseScore != b->chineseScore)             return a->chineseScore > b->chineseScore;           if (a->computerScore != b->computerScore)             return a->computerScore > b->computerScore;           if (a->englishScore != b->englishScore)             return a->englishScore > b->englishScore;           return (a->mathScore > b->mathScore);     }       // Fills total marks and ranks of all Students       /// <summary>     ///     /// </summary>     /// <param name="a"></param>     /// <param name="n"></param>     void computeRanksPoointer(GeovinStudent* a[], int n)     {         // To calculate total marks for all Students         for (int i = 0; i < n; i++)             //a[i]->studentTotalScore = a[i]->chineseScore + a[i]->computerScore + a[i]->englishScore+a[i]->mathScore;           // Sort structure array using user defined         // function compareTwoStudents()          sort(a, a + n, compareTwoStudentsPoointer);         //sort(bgein(a), end(a), compareTwoStudents);           // Assigning ranks after sorting         for (int i = 0; i < n; i++)         {             //a[i]->rankingScore = i + 1;         }     }           // Function for comparing two students according     // to given rules     bool compareTwoStudents(GeovinStudent a, GeovinStudent b)     {         // If total marks are not same then         // returns true for higher total         if (a.studentTotalScore != b.studentTotalScore)             return a.studentTotalScore > b.studentTotalScore;           // If marks in Maths are same then         // returns true for higher marks         if (a.chineseScore != b.chineseScore)             return a.chineseScore > b.chineseScore;           if (a.computerScore != b.computerScore)             return a.computerScore > b.computerScore;           if (a.englishScore != b.englishScore)             return a.englishScore > b.englishScore;           return (a.mathScore > b.mathScore);     }       // Fills total marks and ranks of all Students     void computeRanks(GeovinStudent a[], int n)     {         // To calculate total marks for all Students         for (int i = 0; i < n; i++)             a[i].studentTotalScore = a[i].chineseScore + a[i].computerScore + a[i].englishScore + a[i].mathScore;           // Sort structure array using user defined         // function compareTwoStudents()         sort(a, a + n, compareTwoStudents);         //sort(bgein(a), end(a), compareTwoStudents);           // Assigning ranks after sorting         for (int i = 0; i < n; i++)         {             a[i].rankingScore = i + 1;         }     }         /**     *@brief if 比较小猪等作业 实现方法业务     * edit: geovindu     */     class Geovin     {                   private:           public:         /**         *@brief         *三只小猪重量比较方法（函数）         * eidt: geovindu         */         void getPig();         /**         *@brief         *数据类型占内存空间         * edig: geovindu         */         void dataTypeSize();         /**         *@brief         *实体类三只小猪重量比较方法（函数）         *edit: geovindu         */         void getPigClass();           /**         *@brief         *画星行列显示 方法（函数）         *eidit: geovindu         */         void displayFiveStars();           /**         *@brief         *@param [int] 输入参数名称  行数         *@param [int] 输入参数名称  列数         *运画星行列显示方法（函数）         * ediit: geovindu         */         void displayFiveStars(int row, int column);         /**         *@brief         *@param [char] 输入参数名称  ASCii字符数组         *ASCii显示方法（函数）         * ediit: geovindu         */         void displayASCII(char ascii[]);         /**         *@brief         *@param [long] 输入参数名称  运算的第一个数         *@param [long] 输入参数名称  运算的第二个数         *运算符示例 方法（函数）         * ediit: geovindu         */         void dipslayOperate(long a, long b);         /**         *@brief         *@param [int] 输入参数  第一个整数         *@param [int] 输入参数  第二个整数         *三目运算符示例的显示方法（函数）         * ediit: geovindu         */         void TrinocularOperator(int a, int b);         /**         *@brief         *@param [long] 输入参数  成绩分数         *判断成绩的及格否（函数）         * ediit: geovindu         */         void IsPassExamination(long exam);         /**         * @brief         */         void DisplayCinema();         /**         * @brief         */         void DisplayDoor();         /**         * @brief         */         void DisplayDays();         /**         * @brief         */         void DisplayWhile();         /**         * @brief         */         void DisplayRomd();         /**         * @brief         */         void DisplayRomd(int number);         /**         * @brief         */         void DisplayRomd(int number, std::list<std::string> choices);           /**          * @brief.          *          */         void DisplayNumberLottery();           /**          * @brief.          *          * \param maxnum 【int】输入参数： 整数          */         void DisplayMaxSum(int maxnum);         /**          * @brief .敲桌子          *          * \param maxnum 【int】输入参数： 整数          */         void DisplayDeskKnock(int maxnum);         /**          * @brief 水仙花数.          * 100至1000内的三位数的水仙花数          */         void DisplayNarcissisticNumber();         /**          * @brief 水仙花数.          * 指定范围内的整数中的水仙花数          * \param min 输入参数 【int】 范围内的最小整数          * \param max 输入参数 【int】 范围内的最大整数          */         void DisplayNarcissisticNumber(int min, int max);           /**          * @brief 水仙花数. 实体类          * 100至1000内的三位数的水仙花数          */         list<NarcissisticInfo> DisplayNarcissicticInfos();           //NarcissisticInfo getInfo();         /**          * @brief .          *          * \return          */         NarcissisticList getInfo();         /**          * @brief.          *          */         void DisplayMultiplicationTables();         /**          * @brief 写.          *          */         void CsvCreate();         /// <summary>         ///         /// </summary>         void DisplayAtemDemo();         /// <summary>         ///         /// </summary>         void Displaycsv();           /**          * @brief 显示学生成绩          *          * */         void displayScore();         /// <summary>         ///         /// </summary>         void StudentWelcome();         /// <summary>         ///         /// </summary>         void StudentMenuDisplay();         /// <summary>         ///         /// </summary>         void DisplayStudent();         /// <summary>         ///         /// </summary>         /// <param name="a"></param>         /// <param name="b"></param>         /// <returns></returns>         //bool compareTwoStudents(const GeovinStudent* a,const GeovinStudent* b);         /// <summary>         ///         /// </summary>         /// <param name="a"></param>         /// <param name="n"></param>         //void computeRanks(const GeovinStudent (*a)[], int n);         /// <summary>         ///         /// </summary>         void DisplayVectorStudent();         };           /// <summary>     ///     /// </summary>     void Geovin::DisplayVectorStudent()     {         //GeovinStudent* slist = new GeovinStudent[3];         GeovinStudent slist[3];         //slist ={             //{"geovin",25,45,95,75},{"张三",55,65,45,55},{"涂聚文",25,85,95,75}           // };;         slist[0] = {"geovin",25,45,95,75 };         slist[1] = {"张三",55,65,45,55};         slist[2] = { "涂聚文",25,85,95,75 };             //GeovinStudent* slistPointer = new GeovinStudent[3];         //GeovinStudent* stuDu = new GeovinStudent;         //stuDu->studentName = "geovin";         //stuDu->chineseScore = 25;         //stuDu->computerScore = 45;         //stuDu->englishScore = 95;         //stuDu->mathScore = 75;         ////slistPointer= &slist;         //stuDu = &slistPointer[0];           GeovinStudent* slistPointer[3];             //slistPointer[0]->studentName = "";// {"geovin", 25, 45, 95, 75 };           //slist = { };         GeovinStudent* student = new GeovinStudent;         student->studentName = "geovin";         student->chineseScore = 25;         student->computerScore = 45;         student->englishScore = 95;         student->mathScore = 75;                         vector<GeovinStudent *> stu;         stu.push_back(student);           slistPointer[0]= student;           GeovinStudent* student2 = new GeovinStudent;         student2->studentName = "张三";         student2->chineseScore = 55;         student2->computerScore = 89;         student2->englishScore = 94;         student2->mathScore = 62;         stu.push_back(student2);         slistPointer[1]= student2;             GeovinStudent* student3 = new GeovinStudent;         student3->studentName = "涂聚文";         student3->chineseScore = 35;         student3->computerScore = 85;         student3->englishScore = 45;         student3->mathScore = 95;         stu.push_back(student3);         slistPointer[2]== student3;           //GeovinStudent* stu1 = new GeovinStudent;           //           // sort(begin(stu),end(stu), cmpChineseAsc);                    //vector<GeovinStudent> slist;         //vector<GeovinStudent*> slist;      // GeovinStudent student;         //student.studentName = "geovin";         //student.chineseScore = 25;         //student.computerScore = 45;         //student.englishScore = 95;         //student.mathScore = 75;         //slist.push_back(student);         //student.studentName = "张三";         //student.chineseScore = 55;         //student.computerScore = 65;         //student.englishScore = 45;         //student.mathScore = 55;         //slist.push_back(student);         //student.studentName = "涂聚文";         //student.chineseScore = 25;         //student.computerScore = 85;         //student.englishScore = 85;         //student.mathScore = 75;         //slist.push_back(student);           //cout << "姓名" << "语文" << "英语" << "数学"<<"总分" << endl;         //for (auto du : slist)         //{         //  cout << du.studentName << du.chineseScore << du.computerScore << du.englishScore << du.mathScore << du.studentTotalScore << endl;             //}           cout << "姓名\t" << "语文\t" << "计算机\t" << "英语\t" << "数学\t"<<"总分\t" << endl;          for (auto du : stu)         {              du->studentTotalScore = du->chineseScore + du->englishScore + du->mathScore + du->computerScore;             cout << du->studentName<<"\t" << du->chineseScore << "\t" << du->computerScore << "\t" << du->englishScore << "\t" << du->mathScore << "\t" << du->studentTotalScore << endl;           }          sort(begin(stu), end(stu), cmpMathDesc); //数学排序          //sort(slist,slist.size(), cmpMathAsc)          //sort(stu, stu.size(), cmpMathAsc)          cout << "*********数学排序****************" << endl;          for (auto du : stu)          {              du->studentTotalScore = du->chineseScore + du->englishScore + du->mathScore + du->computerScore;              cout << du->studentName << "\t" << du->chineseScore << "\t" << du->computerScore << "\t" << du->englishScore << "\t" << du->mathScore << "\t" << du->studentTotalScore << endl;            }          cout << "**********总分排序***************" << endl;          computeRanks(slist, 3);          for (auto du : slist)          {              cout << du.studentName << "\t" << du.chineseScore << "\t" << du.computerScore << "\t" << du.englishScore << "\t" << du.mathScore << "\t" << du.studentTotalScore << endl;          }            cout << "**********总分排序***************" << endl;            computeRanksPoointer(slistPointer, 3);          for (auto du : slistPointer)          {              cout << du->studentName << "\t" << du->chineseScore << "\t" << du->computerScore << "\t" << du->englishScore << "\t" << du->mathScore << "\t" << du->studentTotalScore << endl;          }         }

　　

 

 

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/*****************************************************************//**  * \file   geovindu.h  * \brief  业务操作方法  *  * \author geovindu,Geovin Du  * \date   2023-04-05 ***********************************************************************/ /* * 注释插件 https://www.doxygen.nl/download.html https://computingonplains.wordpress.com/doxygen-and-visual-studio/ https://marketplace.visualstudio.com/items?itemName=sergeb.GhostDoc https://marketplace.visualstudio.com/items?itemName=FinnGegenmantel.doxygenComments https://zh-google-styleguide.readthedocs.io/en/latest/google-cpp-styleguide/comments/       */   #ifndef GEOVINDU_H #define GEOVINDU_H #include <vector> // #include directive #include <string> #include <iostream> #include <string.h> #include <list> #include<iostream> #include<fstream> #include<stdio.h> #include<cstdlib> #include<cstring> #include<iomanip> #include <vector> #include <memory>           //#include <sqlite3.h> #include "PigInfo.h" #include "PigNameInfo.h" #include "CinemaScore.h" #include "OpenDoor.h" #include "LeapYear.h" #include "RandomlySampled.h" #include "NumberLottery.h"  #include "InputNumberMax.h" #include "DeskKnock.h" #include "NarcissisticNumber.h" #include "NarcissisticInfo.h" #include "NarcissisticList.h" #include "MultiplicationTables.h" #include "CardinalDirection.h" #include "CSVfilemanagement.h" #include "ATMdemo.h" #include "csvstream.h" //#include "csvparser.h" #include "StudentArry.h" #include "student.h" #include "StudentMenu.h" #include "StudentList.h"   //#include "GeovinStudent.h"       using namespace std;       /** * @brief 类库空间名 * geovindu edit * */ namespace geovindu {                 /**     * @brief 简要说明文字     */     enum class colors : short { red, blue, purple, azure };     /**     * @brief 简要说明文字     */     struct RGB     {         short r{ 0 };  // member initialization         short g{ 0 };         short b{ 0 };     };         /// <summary>    /// 信息    /// </summary>     struct GeovinStudent     {           /// <summary>         /// 姓名         /// </summary>         std::string studentName;         /// <summary>         /// 语文         /// </summary>         int chineseScore;         /// <summary>         /// 英语         /// </summary>         int englishScore;         /// <summary>         /// 数学         /// </summary>         int mathScore;         /// <summary>         ///         /// </summary>         int computerScore;         /// <summary>         /// 个人总分         /// </summary>         int studentTotalScore = chineseScore + englishScore + mathScore + computerScore; //计算 无效         /// <summary>         /// 平均         /// </summary>         int subjectAverage;         /// <summary>         /// 名次         /// </summary>         int rankingScore;           };         /// <summary>     /// 语文成绩排序，降  从大到小     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpChineseAsc(const GeovinStudent* a, const GeovinStudent* b)     {         return a->chineseScore > b->chineseScore;     }     /// <summary>     /// 语文成绩排序，升 从小到大     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpChineseDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->chineseScore < b->chineseScore;     }       /// <summary>     /// 英语成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpEnglishDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->englishScore > b->englishScore;     }     /// <summary>     /// 英语成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpEnglishAsc(GeovinStudent* a, GeovinStudent* b)     {         return a->englishScore < b->englishScore;     }       /// <summary>     /// 数学成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpMathDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->mathScore > b->mathScore;     }     /// <summary>     /// 数学成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpMathAsc(GeovinStudent* a, GeovinStudent* b)     {         return a->mathScore < b->mathScore;     }         /// <summary>     /// 计算机成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpComputerDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->computerScore > b->computerScore;     }     /// <summary>     /// 计算机成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpComputerAsc(GeovinStudent* a, GeovinStudent* b)     {         return a->computerScore < b->computerScore;     }       /// <summary>     /// 个人总分成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpTotalScoreDesc(GeovinStudent* a, GeovinStudent* b)     {         return a->studentTotalScore > b->studentTotalScore;     }     /// <summary>     /// 个人总分成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpTotalScoreAsc(GeovinStudent* a, GeovinStudent* b)     {         return a->studentTotalScore < b->studentTotalScore;     }         //// Function for comparing two students according     //// to given rules     //bool compareTwoStudents(GeovinStudent* a, GeovinStudent* b)     //{     //  // If total marks are not same then     //  // returns true for higher total     //  if (a->studentTotalScore != b->studentTotalScore)     //      return a->studentTotalScore > b->studentTotalScore;       //  // If marks in Maths are same then     //  // returns true for higher marks     //  if (a->chineseScore != b->chineseScore)     //      return a->chineseScore > b->chineseScore;       //  if (a->computerScore != b->computerScore)     //      return a->computerScore > b->computerScore;       //  if (a->englishScore != b->englishScore)     //      return a->englishScore > b->englishScore;       //  return (a->mathScore > b->mathScore);     //}       //// Fills total marks and ranks of all Students     //void computeRanks(GeovinStudent* a[], int n)     //{     //  // To calculate total marks for all Students     //  for (int i = 0; i < n; i++)     //      a[i]->studentTotalScore = a[i]->chineseScore + a[i]->computerScore + a[i]->englishScore+a[i]->mathScore;       //  // Sort structure array using user defined     //  // function compareTwoStudents()     //   sort(a, a + n, compareTwoStudents);     //  //sort(bgein(a), end(a), compareTwoStudents);       //  // Assigning ranks after sorting     //  for (int i = 0; i < n; i++)     //  {     //      a[i]->rankingScore = i + 1;     //  }     //}           // Function for comparing two students according     // to given rules     bool compareTwoStudents(GeovinStudent a, GeovinStudent b)     {         // If total marks are not same then         // returns true for higher total         if (a.studentTotalScore != b.studentTotalScore)             return a.studentTotalScore > b.studentTotalScore;           // If marks in Maths are same then         // returns true for higher marks         if (a.chineseScore != b.chineseScore)             return a.chineseScore > b.chineseScore;           if (a.computerScore != b.computerScore)             return a.computerScore > b.computerScore;           if (a.englishScore != b.englishScore)             return a.englishScore > b.englishScore;           return (a.mathScore > b.mathScore);     }       // Fills total marks and ranks of all Students     void computeRanks(GeovinStudent a[], int n)     {         // To calculate total marks for all Students         for (int i = 0; i < n; i++)             a[i].studentTotalScore = a[i].chineseScore + a[i].computerScore + a[i].englishScore + a[i].mathScore;           // Sort structure array using user defined         // function compareTwoStudents()         sort(a, a + n, compareTwoStudents);         //sort(bgein(a), end(a), compareTwoStudents);           // Assigning ranks after sorting         for (int i = 0; i < n; i++)         {             a[i].rankingScore = i + 1;         }     }         /**     *@brief if 比较小猪等作业 实现方法业务     * edit: geovindu     */     class Geovin     {                   private:           public:         /**         *@brief         *三只小猪重量比较方法（函数）         * eidt: geovindu         */         void getPig();         /**         *@brief         *数据类型占内存空间         * edig: geovindu         */         void dataTypeSize();         /**         *@brief         *实体类三只小猪重量比较方法（函数）         *edit: geovindu         */         void getPigClass();           /**         *@brief         *画星行列显示 方法（函数）         *eidit: geovindu         */         void displayFiveStars();           /**         *@brief         *@param [int] 输入参数名称  行数         *@param [int] 输入参数名称  列数         *运画星行列显示方法（函数）         * ediit: geovindu         */         void displayFiveStars(int row, int column);         /**         *@brief         *@param [char] 输入参数名称  ASCii字符数组         *ASCii显示方法（函数）         * ediit: geovindu         */         void displayASCII(char ascii[]);         /**         *@brief         *@param [long] 输入参数名称  运算的第一个数         *@param [long] 输入参数名称  运算的第二个数         *运算符示例 方法（函数）         * ediit: geovindu         */         void dipslayOperate(long a, long b);         /**         *@brief         *@param [int] 输入参数  第一个整数         *@param [int] 输入参数  第二个整数         *三目运算符示例的显示方法（函数）         * ediit: geovindu         */         void TrinocularOperator(int a, int b);         /**         *@brief         *@param [long] 输入参数  成绩分数         *判断成绩的及格否（函数）         * ediit: geovindu         */         void IsPassExamination(long exam);         /**         * @brief         */         void DisplayCinema();         /**         * @brief         */         void DisplayDoor();         /**         * @brief         */         void DisplayDays();         /**         * @brief         */         void DisplayWhile();         /**         * @brief         */         void DisplayRomd();         /**         * @brief         */         void DisplayRomd(int number);         /**         * @brief         */         void DisplayRomd(int number, std::list<std::string> choices);           /**          * @brief.          *          */         void DisplayNumberLottery();           /**          * @brief.          *          * \param maxnum 【int】输入参数： 整数          */         void DisplayMaxSum(int maxnum);         /**          * @brief .敲桌子          *          * \param maxnum 【int】输入参数： 整数          */         void DisplayDeskKnock(int maxnum);         /**          * @brief 水仙花数.          * 100至1000内的三位数的水仙花数          */         void DisplayNarcissisticNumber();         /**          * @brief 水仙花数.          * 指定范围内的整数中的水仙花数          * \param min 输入参数 【int】 范围内的最小整数          * \param max 输入参数 【int】 范围内的最大整数          */         void DisplayNarcissisticNumber(int min, int max);           /**          * @brief 水仙花数. 实体类          * 100至1000内的三位数的水仙花数          */         list<NarcissisticInfo> DisplayNarcissicticInfos();           //NarcissisticInfo getInfo();         /**          * @brief .          *          * \return          */         NarcissisticList getInfo();         /**          * @brief.          *          */         void DisplayMultiplicationTables();         /**          * @brief 写.          *          */         void CsvCreate();         /// <summary>         ///         /// </summary>         void DisplayAtemDemo();         /// <summary>         ///         /// </summary>         void Displaycsv();           /**          * @brief 显示学生成绩          *          * */         void displayScore();         /// <summary>         ///         /// </summary>         void StudentWelcome();         /// <summary>         ///         /// </summary>         void StudentMenuDisplay();         /// <summary>         ///         /// </summary>         void DisplayStudent();         /// <summary>         ///         /// </summary>         /// <param name="a"></param>         /// <param name="b"></param>         /// <returns></returns>         //bool compareTwoStudents(const GeovinStudent* a,const GeovinStudent* b);         /// <summary>         ///         /// </summary>         /// <param name="a"></param>         /// <param name="n"></param>         //void computeRanks(const GeovinStudent (*a)[], int n);         /// <summary>         ///         /// </summary>         void DisplayVectorStudent();         };           /// <summary>     ///     /// </summary>     void Geovin::DisplayVectorStudent()     {         //GeovinStudent* slist = new GeovinStudent[3];         GeovinStudent slist[3];         //slist ={             //{"geovin",25,45,95,75},{"张三",55,65,45,55},{"涂聚文",25,85,95,75}           // };;         slist[0] = {"geovin",25,45,95,75 };         slist[1] = {"张三",55,65,45,55};         slist[2] = { "涂聚文",25,85,95,75 };           //slist = { };         GeovinStudent* student = new GeovinStudent;         student->studentName = "geovin";         student->chineseScore = 25;         student->computerScore = 45;         student->englishScore = 95;         student->mathScore = 75;                         vector<GeovinStudent *> stu;         stu.push_back(student);                     GeovinStudent* student2 = new GeovinStudent;         student2->studentName = "张三";         student2->chineseScore = 55;         student2->computerScore = 89;         student2->englishScore = 94;         student2->mathScore = 62;         stu.push_back(student2);           GeovinStudent* student3 = new GeovinStudent;         student3->studentName = "涂聚文";         student3->chineseScore = 35;         student3->computerScore = 85;         student3->englishScore = 45;         student3->mathScore = 95;         stu.push_back(student3);           //GeovinStudent* stu1 = new GeovinStudent;           //           // sort(begin(stu),end(stu), cmpChineseAsc);                    //vector<GeovinStudent> slist;         //vector<GeovinStudent*> slist;      // GeovinStudent student;         //student.studentName = "geovin";         //student.chineseScore = 25;         //student.computerScore = 45;         //student.englishScore = 95;         //student.mathScore = 75;         //slist.push_back(student);         //student.studentName = "张三";         //student.chineseScore = 55;         //student.computerScore = 65;         //student.englishScore = 45;         //student.mathScore = 55;         //slist.push_back(student);         //student.studentName = "涂聚文";         //student.chineseScore = 25;         //student.computerScore = 85;         //student.englishScore = 85;         //student.mathScore = 75;         //slist.push_back(student);           //cout << "姓名" << "语文" << "英语" << "数学"<<"总分" << endl;         //for (auto du : slist)         //{         //  cout << du.studentName << du.chineseScore << du.computerScore << du.englishScore << du.mathScore << du.studentTotalScore << endl;             //}           cout << "姓名\t" << "语文\t" << "计算机\t" << "英语\t" << "数学\t"<<"总分\t" << endl;          for (auto du : stu)         {              du->studentTotalScore = du->chineseScore + du->englishScore + du->mathScore + du->computerScore;             cout << du->studentName<<"\t" << du->chineseScore << "\t" << du->computerScore << "\t" << du->englishScore << "\t" << du->mathScore << "\t" << du->studentTotalScore << endl;           }          sort(begin(stu), end(stu), cmpMathDesc); //数学排序          //sort(slist,slist.size(), cmpMathAsc)          //sort(stu, stu.size(), cmpMathAsc)          cout << "*********数学排序****************" << endl;          for (auto du : stu)          {              du->studentTotalScore = du->chineseScore + du->englishScore + du->mathScore + du->computerScore;              cout << du->studentName << "\t" << du->chineseScore << "\t" << du->computerScore << "\t" << du->englishScore << "\t" << du->mathScore << "\t" << du->studentTotalScore << endl;            }          cout << "**********总分排序***************" << endl;          computeRanks(slist, 3);          for (auto du : slist)          {              cout << du.studentName << "\t" << du.chineseScore << "\t" << du.computerScore << "\t" << du.englishScore << "\t" << du.mathScore << "\t" << du.studentTotalScore << endl;          }           }

　　

 

以下这样写的，无法去引用，引用就报错：

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// GeovinStudent.h : 此文件包含 "GeovinStudent" 类。学生数组成绩显示方法 C++ 14 // 2023年4月19日 涂聚文 Geovin Du edit.       #pragma once #ifndef GEOVINSTUDENT_H #define GEOVINSTUDENT_H     #include<iostream> #include<string> #include<string.h> #include<sstream> #include<algorithm> #include<cstring> #include<cmath>     using namespace std;     /** * */ namespace geovindu {       /// <summary>     /// 信息     /// </summary>     struct GeovinStudent     {           /// <summary>         /// 姓名         /// </summary>         std::string studentName;         /// <summary>         /// 语文         /// </summary>         int chineseScore;         /// <summary>         /// 英语         /// </summary>         int englishScore;         /// <summary>         /// 数学         /// </summary>         int mathScore;         /// <summary>         ///         /// </summary>         int computerScore;         /// <summary>         /// 个人总分         /// </summary>         int studentTotalScore = chineseScore + englishScore + mathScore + computerScore; //无效         /// <summary>         /// 平均         /// </summary>         int subjectAverage;         /// <summary>         /// 名次         /// </summary>         int rankingScore;           };         /// <summary>     /// 语文成绩排序，降  从大到小     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpChineseAsc(GeovinStudent a, GeovinStudent b)     {         return a.chineseScore > b.chineseScore;     }     /// <summary>     /// 语文成绩排序，升 从小到大     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpChineseDesc(GeovinStudent a, GeovinStudent b)     {         return a.chineseScore < b.chineseScore;     }       /// <summary>     /// 英语成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpEnglishAsc(GeovinStudent a, GeovinStudent b)     {         return a.englishScore > b.englishScore;     }     /// <summary>     /// 英语成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpEnglishDesc(GeovinStudent a, GeovinStudent b)     {         return a.englishScore < b.englishScore;     }       /// <summary>     /// 数学成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpMathAsc(GeovinStudent a, GeovinStudent b)     {         return a.mathScore > b.mathScore;     }     /// <summary>     /// 数学成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpMathDesc(GeovinStudent a, GeovinStudent b)     {         return a.mathScore < b.mathScore;     }         /// <summary>     /// 计算机成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpComputerAsc(GeovinStudent a, GeovinStudent b)     {         return a.computerScore > b.computerScore;     }     /// <summary>     /// 计算机成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpComputerDesc(GeovinStudent a, GeovinStudent b)     {         return a.computerScore < b.computerScore;     }       /// <summary>     /// 个人总分成绩排序，降     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpTotalScoreAsc(GeovinStudent a, GeovinStudent b)     {         return a.studentTotalScore > b.studentTotalScore;     }     /// <summary>     /// 个人总分成绩排序，升     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     bool cmpTotalScoreDesc(GeovinStudent a, GeovinStudent b)     {         return a.studentTotalScore < b.studentTotalScore;     }       }       #endif

　　

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// GeovinStudentSort.cpp : 此文件包含 "GeovinStudentSort" 类。学生数组成绩显示方法 C++ 14 // 2023年4月19日 涂聚文 Geovin Du edit.     #include "GeovinStudentSort.h" #include<iostream> #include<fstream> #include<stdio.h> #include<cstdlib> #include<cstring> #include<iomanip> #include <list> #include <vector> #include <memory>   #include "GeovinStudent.h"   using namespace std;     /** * */ namespace geovindu {           /// <summary>     ///     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::ChineseAsc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpChineseAsc);         list = student;         return list;     }     /// <summary>     ///     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::ChineseDesc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpChineseDesc);         list = student;         return list;     }       /// <summary>     ///     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::EnlgishAsc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpEnglishAsc);         list = student;         return list;     }     /// <summary>     ///     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::EnlgishDesc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpEnglishDesc);         list = student;         return list;     }         /// <summary>     ///     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::MathAsc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpMathAsc);         list = student;         return list;     }     /// <summary>     ///     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::MathDesc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpMathDesc);         list = student;         return list;     }       /// <summary>     /// Computer     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::ComputerAsc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpComputerAsc);         list = student;         return list;     }     /// <summary>     ///     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::ComputerDesc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpComputerDesc);         list = student;         return list;     }         /// <summary>     /// TotalScore     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::TotalScoreAsc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpTotalScoreAsc);         list = student;         return list;     }     /// <summary>     ///     /// </summary>     /// <param name="student"></param>     /// <returns></returns>     vector<GeovinStudent> GeovinStudentSort::TotalScoreDesc(vector<GeovinStudent> student)     {         vector<GeovinStudent> list;         sort(std::begin(student), std::end(student), cmpTotalScoreDesc);         list = student;         return list;     }       }

　　以上写法不能引用，引用报错，

 

Automatically Detecting Text Encodings

https://github.com/AutoItConsulting/text-encoding-detect
https://preshing.com/20200727/automatically-detecting-text-encodings-in-cpp/
https://github.com/arc80/plywood
https://learn.microsoft.com/en-us/answers/questions/1058919/automatically-detect-text-file-encoding
https://www.codeproject.com/articles/17201/detect-encoding-for-in-and-outgoing-text