cpp:Double Dimensional Array using vector

 

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// StudentArry.cpp : //练习案例：学生数组成绩显示方法  StudentArry //案例描述：学生数组成绩显示方法     #include "StudentArry.h"   #include <iostream> #include <string> #include <vector> #include <memory> #include <iostream> #include <list>     using namespace std;     /**  * @brief  * \author geovindu.  * \date 20230-4-10  */ namespace geovindu {       /// <summary>     /// 学生成绩     /// 数组用法     /// </summary>     void StudentArry::displayStudent()     {           //         int SubjectScore = 0;         //         int grossScore = 0;           string name[5] = { "张三","李四","王五","涂聚文","Geovin" };         const int nameCount = size(name);         string Subject[4] = { "语文","数学","英语","物理" };         const int SubjectCount = size(Subject);         string strname = "";         //前人数 后分数         int ScoreList[nameCount][SubjectCount] = { { 100,100,100,99 },{ 90,50,100,60 },{ 60,70,80,77 },{ 20,30,40,27 },{ 10,20,50,17 } };           //表标题         cout << "\t";         for (int i = 0; i < SubjectCount; i++)         {               cout << Subject[i] + "\t";           }         cout << "总分";         cout << endl;         //内容列表         for (int i = 0; i < nameCount; i++)         {             grossScore = 0;             cout << name[i] << "\t";             for (int j = 0; j < SubjectCount; j++)             {                 cout << ScoreList[i][j] << "\t";                 grossScore = grossScore + ScoreList[i][j];             }             cout << grossScore;             cout << endl;           }         //求总分和平均分         int sum = 0;         int ver[SubjectCount];         cout << "科总分  ";         for (int i = 0; i < SubjectCount; i++)         {             SubjectScore = 0;             for (int j = 0; j < nameCount; j++)             {                 SubjectScore = SubjectScore + ScoreList[j][i];             }             sum = sum + SubjectScore;             ver[i] = SubjectScore / nameCount;             cout << SubjectScore << "\t";         }         cout << sum;         cout << endl;         //显示分均分行         cout << "平均分  ";         for (int i = 0; i < SubjectCount; i++)         {             cout << ver[i] << "\t";         }         cout << endl;         cout << "***********************************" << endl;           /*         for (int i = 0; i < 3; i++)         {             ge = 0;             for (int j = 0; j < 3; j++)             {                 ge = ge + chengji[i][j];               }               strname = name[i] + to_string(ge);             cout << name[i] << "个人总分:" << ge << endl;             //cout <<"个人总分："<< strname << endl;               yuwen = 0;             for (int j = 0; j < 3; j++)             {                 yuwen = yuwen + chengji[j][i];               }             cout << cheng[i] << "课程总分数:" << yuwen << endl;           }         */         }     /// <summary>     ///  学生成绩     /// </summary>     /// <param name="name">学生姓名列表</param>     /// <param name="Subject">课程列表</param>     /// <param name="ScoreList">分数列表</param>     void StudentArry::displayStudent(string name[5], string Subject[4], int ScoreList[5][4])     {         //         int SubjectScore = 0;         //         int grossScore = 0;         const int nameCount = sizeof(name);         const int SubjectCount = sizeof(Subject);         string strname = "";         //表标题         cout << "\t";         for (int i = 0; i < SubjectCount; i++)         {               cout << Subject[i] + "\t";           }         cout << "总分";         cout << endl;         //内容列表         for (int i = 0; i < nameCount; i++)         {             grossScore = 0;             cout << name[i] << "\t";             for (int j = 0; j < SubjectCount; j++)             {                 cout << ScoreList[i][j] << "\t";                 grossScore = grossScore + ScoreList[i][j];             }             cout << grossScore;             cout << endl;           }         //求总分和平均分         int sum = 0;         int ver[SubjectCount];         cout << "科总分  ";         for (int i = 0; i < SubjectCount; i++)         {             SubjectScore = 0;             for (int j = 0; j < nameCount; j++)             {                 SubjectScore = SubjectScore + ScoreList[j][i];             }             sum = sum + SubjectScore;             ver[i] = SubjectScore / nameCount;             cout << SubjectScore << "\t";         }         cout << sum;         cout << endl;         //显示分均分行         cout << "平均分  ";         for (int i = 0; i < SubjectCount; i++)         {             cout << ver[i] << "\t";         }         cout << endl;         cout << "***********************************" << endl;             }       /// <summary>     ///  学生成绩     /// </summary>     /// <param name="name">学生姓名列表</param>     /// <param name="Subject">课程列表</param>     /// <param name="ScoreList">分数列表</param>     void StudentArry::displayStudentVector(vector<string> name, vector<string>Subject, vector<vector<int>> ScoreList)     {               //         int SubjectScore = 0;               //         int grossScore = 0;         const int nameCount = name.size();         const int SubjectCount = Subject.size();         //const int vCout = SubjectCount;// Subject.size();         const int geovindu= Subject.size();         string strname = "";         //表标题         cout << "\t";         for (int i = 0; i < SubjectCount; i++)         {               cout << Subject[i] + "\t";           }         cout << "总分";         cout << endl;         //内容列表         for (int i = 0; i < nameCount; i++)         {             grossScore = 0;             cout << name[i] << "\t";             for (int j = 0; j < SubjectCount; j++)             {                 cout << ScoreList[i][j] << "\t";                 grossScore = grossScore + ScoreList[i][j];             }             cout << grossScore;             cout << endl;           }         //求总分和平均分         int sum = 0;         const int vcout = Subject.size();         int* verScore =new int[vcout];         cout << "科总分  ";         for (int i = 0; i < SubjectCount; i++)         {             SubjectScore = 0;             for (int j = 0; j < nameCount; j++)             {                 SubjectScore = SubjectScore + ScoreList[j][i];             }             sum = sum + SubjectScore;             verScore[i] = SubjectScore / nameCount;             cout << SubjectScore << "\t";         }         cout << sum;         cout << endl;         //显示分均分行         cout << "平均分  ";         for (int i = 0; i < SubjectCount; i++)         {             cout << verScore[i] << "\t";         }         cout << endl;         cout << "***********************************" << endl;                   }   }         // StudentArry.h : 此文件包含 "StudentArry" 类。学生数组成绩显示方法 C++ 14 // 2023年4月9日 涂聚文 Geovin Du edit. //（1）vec1.size() 就是”二维数组”的行数 //（2）vec1[0].size() 就是”二维数组”的列数 //vector<vector<double>> geovindu     #pragma once #ifndef STUDENTARRY_H #define STUDENTARRY_H   #include <iostream> #include <string> #include <vector> #include <memory> #include <iostream> #include <string> #include <ctime> #include <cstdlib> #include <list>   using namespace std;     /** * */ namespace geovindu {         /// <summary>     /// 学生数组成绩显示方法     /// </summary>     class StudentArry     {       private:                 public:           void displayStudent();         /// <summary>         ///  学生成绩         /// </summary>         /// <param name="name">学生姓名列表</param>         /// <param name="Subject">课程列表</param>         /// <param name="ScoreList">分数列表</param>         void displayStudent(string name[5], string Subject[5], int ScoreList[5][4]);         /// <summary>         ///  学生成绩         /// </summary>         /// <param name="name">学生姓名列表</param>         /// <param name="Subject">课程列表</param>         /// <param name="ScoreList">分数列表</param>         void displayStudentVector(vector<string> name, vector<string>Subject, vector<vector<int>> ScoreList);           };   }   #endif

　　

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void Geovin::displayScore() {         string name[5] = { "张三","李四","王五","涂聚文","Geovin" };     string Subject[4] = { "语文","数学","英语","物理" };     int ScoreList[5][4] = { { 100,100,100,99 },{ 90,50,100,60 },{ 60,70,80,77 },{ 20,30,40,27 },{ 10,20,50,17 } };     StudentArry arry;     //1     arry.displayStudent();     /**/     vector<string> sname;     vector<string> sbject;       int c = 0;     for (auto i : name)     {         sname.push_back(i);         //cout << i << endl;         //sname[c] = i;         c++;     }     c = 0;     for (auto i : Subject)     {         sbject.push_back(i);         //sbject[c] = i;         //cout << i << endl;         c++;     }                   const int nameCount = name->size();     const int SubjectCount = Subject->size();     vector<int> w(10, 1);  // w: width  即列数     vector< vector<int> > arr(9, w);   // 9行10列 二维数组     //vector<vector<int>> sscore[5][4];     vector<vector<int> > sscore(nameCount, vector<int>(SubjectCount));     for (int i = 0; i < nameCount; i++)     {                   for (int j = 0; j < SubjectCount; j++)         {               //cout << ScoreList[i][j] << endl;             int geovindu = ScoreList[i][j];             sscore[i][j] = geovindu;// ;                       }       }     //显示     /*     for (int i = 0; i < sscore.size(); ++i) {         for (int j = 0; j < sscore[0].size(); ++j) {             cout << sscore[i][j] << "  ";         }         cout << endl;     }     */     arry.displayStudentVector(sname, sbject, sscore);         }

　　

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Geovin geovin; //成绩显示 geovin.displayScore();

　　

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