cpp: two cups waters

 

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/*****************************************************************//**  * \file   TwoCupsOfWaters.h  * \brief   * 平衡数的定义：将一个数分成左右两部分，分别成为2个新数。左右不分必须满足：  * 1、左边和右边至少存在一位  * 2、左边数的每一位相乘如果等于右边数每一位相乘  * 则这个数称为平衡数。  * \author geovindu  * \date 20  May 2023  *********************************************************************/     #pragma once #ifndef TWOCUPSOFWATERS_H #define TWOCUPSOFWATERS_H   #include<cstring> #include<stdbool.h> #include<stdlib.h> #include<iostream> #include<malloc.h> #include<cmath> #include <iostream> #include <sstream> #include <vector> #include <algorithm> #include <array> #include <functional> #include <list> #include <string> #include <string.h>       using namespace std;         namespace DuStructSimple {       /// <summary>     ///     /// </summary>     struct TwoWater     {         /// <summary>         /// 第一杯         /// </summary>         int OneCups;         /// <summary>         /// 第二杯         /// </summary>         int TwoCups;         };     /// <summary>     ///     /// </summary>     /// <typeparam name="T"></typeparam>     /// <param name="a"></param>     /// <param name="b"></param>     template<typename T>     void duswap(T& a, T& b)     {         T temp(a);         a = b;         b = temp;       }     /// <summary>     /// 两值交换     /// </summary>     /// <param name="ptr_a"></param>     /// <param name="ptr_b"></param>     void swap(int* ptr_a, int* ptr_b)     {         int temp = *ptr_a;         *ptr_a = *ptr_b;         *ptr_b = temp;     }     /// <summary>     /// 两值交换     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     void swap1(int* a, int* b)     {         *a = *a + *b;         *b = *a - *b;         *a = *a - *b;       }     /// <summary>     /// 两值交换     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     void swap2(int* a, int* b)     {         *a = *a * *b;         *b = *a / *b;         *a = *a / *b;     }     /// <summary>     /// 两值交换     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     void swap3(int* a, int* b)     {         *a = *a ^ *b;         *b = *a ^ *b;         *a = *a ^ *b;     }       /// <summary>     ///     /// </summary>     /// <param name="arr"></param>     /// <param name="length"></param>     /// <returns></returns>     int calcBalance(int arr[], int length)     {         int* left = new int[length]; //left[i]为从第0个到第i-1个的和         int* right = new int[length]; //right[i]为从第i+1个到第len-1个的和         int b = length - 1;         for (int i = 0; i < length; i++)         {             if (i == 0)                 left[i] = 0;             else                 left[i] = left[i - 1] + arr[i - 1];         }         for (; b >= 0; b--)         {             if (b == length - 1)                 right[b] = 0;             else                 right[b] = right[b + 1] + arr[b + 1];             if (left[b] == right[b])             {                 delete[] left;                 delete[] right;                 return b;             }         }           delete[] left;         delete[] right;         return -1;     }     /// <summary>     ///     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     int bacance(int a, int b)     {         float ba = 0;         float bb = 0;         float ver = (a + b) / 2; //平均值         if (a > b)         {             ba = a - ver;             bb = ver - b;             cout << "第一杯水量大于第二杯水：" <<a<<">"<<b << endl;             cout << "第一杯倒去" << ba << "升水给第二杯，两杯水相同" << endl;         }         if (a < b)         {             ba = ver - a;             bb = b - ver;             cout << "第一杯水量小于第二杯水：" << a << "<" << b << endl;             cout << "第二杯倒去" << bb << "升水给第一杯，两杯水相同" << endl;         }         if (a == b)         {             cout << "第一杯水量等于第二杯水：" << a << "=" << b << endl;         }           return ver;       }       /// <summary>     ///     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     float bacancePoint(int* a, int* b)     {         float ba = 0;         float bb = 0;         float ver = (*a + *b) / 2; //平均值           if (*a > *b)         {             ba = *a- ver;             bb = ver -*b  ;                               cout << "第一杯水量大于第二杯水：" << *a << ">" << *b << endl;             cout << "第一杯倒去" << ba << "升水给第二杯，两杯水相同"<< endl;                       }         if (*a < *b)         {             ba = ver- *a;             bb = *b-ver  ;             cout << "第一杯水量小于第二杯水：" << *a << "<" << *b << endl;             cout << "第二杯倒去" << bb << "升水给第一杯，两杯水相同" << endl;         }         if (*a == *b)         {             cout << "第一杯水量等于第二杯水：" << *a << "=" << *b << endl;         }           return ver;       }     /// <summary>     /// 判断是否平衡数     /// https ://blog.csdn.net/sinat_30440627/article/details/65448970     ///     /// </summary>     /// <param name="n"></param>     /// <returns></returns>     bool isBalance(int n) {         if (n < 10) {             return false;         }         int count = 0;         int temp = n;   //计算位数         while (temp != 0) {             temp /= 10;             count++;         }         vector<int> ret;   //由低位到高位放入容器内         while (n != 0) {             ret.push_back(n % 10);             n /= 10;         }           int flag = false;         int mult1 = 1;         for (int i = 0; i < count - 1; i++) {   //循环相乘判断是否相等             mult1 *= ret[i];   //右边相乘结果             int mult2 = 1;             for (int j = i + 1; j < count; j++) {                 mult2 *= ret[j];  //左边相乘结果             }             if (mult1 == mult2) {                 flag = true;                 break;             }         }         if (flag) {             return true;         }         else {             return false;         }     }     /// <summary>     /// 判断是否平衡数     /// https://www.cnblogs.com/omelet/p/6617086.html     /// </summary>     /// <param name="arr"></param>     /// <param name="n"></param>     /// <returns></returns>     bool findCount(vector<int> arr, int n) {         // write code here         if (n < 2 || n>50)             return false;           int begin = 0;         int end = n - 1;         long long res1 = 1;         long long res2 = 1;         int count = 0;         for (int i = 0; i < n; i++)         {             if (arr[i] == 0)                 count++;         }         if (count >= 2)//处理含有多个0的情况             return true;           while (begin <= end)         {             if (res1 <= res2)             {                 res1 *= arr[begin];                 begin++;             }             else             {                 res2 *= arr[end];                 end--;             }         }         if (res1 == res2)             return true;         else             return false;     }     /// <summary>     /// 是否平衡数     /// </summary>     /// <param name="onecup"></param>     /// <returns></returns>     bool isduBalanc(int onecup)     {               if (onecup <= 10)         {             cout << "不是平衡数" << endl;             return false;           }         vector<int> res;         while (onecup)         {             res.push_back(onecup % 10);             onecup /= 10;         }         bool result = findCount(res, res.size());         if (result == 1)         {             cout << "是平衡数" << endl;             return true;         }                       if (result == 0)         {             cout << "不是平衡数" << endl;             return false;         }                         }     /// <summary>     ///     /// </summary>     /// <param name="a"></param>     /// <param name="b"></param>     /// <returns></returns>     int difference(int *a, int *b)     {         int di = 0;         float offset = 0;         if (a > b)         {             offset = (*a - *b) / 2;           }         else         {             offset = (*b - *a) / 2;         }         //int ad = *a + offset;         //int bd = *b +offset;           *a = *a + offset;         *b = *b + offset;           if (*a == *b)         {               cout << "两杯水水位平衡" << endl;             int* p = a;             int* p2 = b;             //*p = &a;             //*p2 = &b;             cout << "两杯水正互相交换" << endl;             swap(p, p2);             di = offset;         }         else         {             cout << "两杯水水位不平衡" << endl;             int* p = a;             int* p2 = b;             //*p = &a;             //*p2 = &b;             cout << "两杯水正互相交换" << endl;             swap(p, p2);         }           return di;         }     /// <summary>     ///     /// </summary>     /// <param name="n"></param>     /// <returns></returns>     bool match(int n) {   //平衡数匹配         //int to string         /*ostringstream oss;         oss << n;         string s = oss.str();*/         string s = to_string(n);  //c++11           int len = s.size(), mid = len / 2;         bool isEven = (len % 2 == 0);         int frontNum = 0, tailNum = 0;           for (int i = 0; i < len; i++) {             if (i < mid) frontNum += s[i] - '0';             //Even: mid ~ len-1,  Odd: mid+1 ~ len-1             else if ((isEven && i == mid) || i > mid) tailNum += s[i] - '0';         }         return frontNum == tailNum;     }     /// <summary>     ///     /// </summary>     /// <param name="n"></param>     /// <returns></returns>     int balanceNum(int n) {         int sum = 0;           if (n <= 10) { return 0; }         if (n > 10) {             int newNum = n;             if (n >= 100) newNum = 99;             int count = newNum / 10;             for (int i = 1, j = 1; i <= count; i++, j++) {                 sum += i * 10 + j;                 cout << i * 10 + j << ", ";             }         }         if (n >= 100) {             int count = 0;             for (int i = 101; i <= n; i++) {                 if (match(i)) {                     count++;                     cout << i << ", ";                     if (count % 10 == 0) {                         cout << endl;                     }                     sum += i;                 }             }         }         return sum;     }         } #endif

　　

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/// <summary>    /// 两杯水    /// </summary>    void GeovinDu::dispalyTowCups()    {          int onecup = 0;        int twocup = 0;        try        {                 /* cin.clear();*/                std::cout << "请输入第一杯水（整数（0-100））：" << endl;                  while (true)                {                    //if (onecup > 0)                    //    break;                    std::cin >> onecup;                    //规换成：                   // onecup = getchar();                    //while (!(cin >> onecup))                    //{                    //    std::cout << "输入的数据类型错误，请重新输入第一杯水:";//输入整数的需要两次                    //    cin.clear();      //这一句很总要，将cin重新标记为正确，以达到重新输入的目的                    //    while (cin.get() != '\n')     //这里清空之前cin缓冲区的数据                    //        continue;                    //   // while (getchar() != '\n');                    //                     //}                     //if (typeid(onecup) == typeid(int)) {                    //    cout << "a的数据类型是：整型" << endl;                    //}                    //if (!(cin >> twocup))                    //{                    //    cout << "输入的数据类型错误，请重新输入第一杯水:";                    //    cin.clear();      //这一句很总要，将cin重新标记为正确，以达到重新输入的目的                    //    while (cin.get() != '\n')     //这里清空之前cin缓冲区的数据                    //        continue;                    //    //while (getchar() != '\n')                    //    //     continue;                    //}                    //else                    //{                                         //if (cin.rdstate())  ||  if (cin.rdstate() != ios::goodbit) 这两个也判断cin是否出错                    ios_base::iostate flag = cin.rdstate();                    //cout << flag << endl;                    while (cin.fail())                    {                        cerr << "输入错误！请重新输入第一杯水:";                        cin.clear();                        //cin.ignore();                        //cin.sync();                        //cin.ignore(1, EOF);                        //std::cin.ignore(numeric_limits<streamsize>::max(), '\n');                        cin.ignore(100, '\n');                        cin >> onecup;                    }                                      if (onecup > 0 && onecup <= 100)                    {                        break;                    }                    else                    {                        cin.clear();                        std::cout << "输入的数据无效！重新输入第一杯水" << endl; //输入字符型，显示这个死循环                        continue;                    }                    //}                                                 } //while (onecup > 0 && onecup <= 100);                //while (getchar() != '\n')                //    continue;                  //do                //{                //     cin >> onecup;                //     while (!(cin >> onecup))                //     {                //         cout << "输入的数据类型错误，请重新输入第一杯水:";                //         cin.clear();     //这一句很总要，将cin重新标记为正确，以达到重新输入的目的                //         while (cin.get() != '\n')        //这里清空之前cin缓冲区的数据                //             continue;                //         //break;                //     }                 //     if (onecup > 0 && onecup <= 100)                //     {                //         //cin.clear();                //         //while (cin.get() != '\n')      //这里清空之前cin缓冲区的数据                //         //    continue;                //         break;                //     }                //     else                //     {                //         cout << "输入的数据无效！重新输入第一杯水" << endl;                //         continue;                //     }                       //                          //} while (onecup > 0 && onecup <= 100);                cin.clear();                std::cout << "请输入第二杯水（整数（0-100））" << endl;                while (true)                {                    cin >> twocup;                    while (cin.fail())                    {                        cerr << "输入错误！请重新输入第二杯水::";                        cin.clear();                        //cin.ignore();                        //cin.sync();                        //cin.ignore(1, EOF);                        //std::cin.ignore(numeric_limits<streamsize>::max(), '\n');                        cin.ignore(100, '\n');                        cin >> twocup;                    }                    //twocup = getchar();                    //while (!(cin >> twocup))                    //{                    //    std::cout << "输入的数据类型错误，请重新输入第二杯水:";                    //    cin.clear();      //这一句很总要，将cin重新标记为正确，以达到重新输入的目的                    //    while (cin.get() != '\n')     //这里清空之前cin缓冲区的数据                    //        continue;                    //}                    //if (!(cin >> twocup))                    //{                    //    std::cout << "输入的数据类型错误，请重新输入第二杯水:";                    //         cin.clear();     //这一句很总要，将cin重新标记为正确，以达到重新输入的目的                    //        while (cin.get() != '\n')     //这里清空之前cin缓冲区的数据                    //            continue;                    //}                        if (twocup > 0 && twocup <= 100)                    {                        //cin.clear();                        //while (cin.get() != '\n')     //这里清空之前cin缓冲区的数据                        //    continue;                        break;                    }                    else                    {                        cin.clear();                        std::cout << "输入的数据无效！重新输入第二杯水" << endl;                        continue;                    }                  }                std::cout << "原值" << endl;                std::cout <<"\t第一杯水"<< "\t第二杯水" << endl;                std::cout << "\t" << onecup << "\t\t" << twocup << endl;                int cal[2] = { onecup,twocup };                int* sd = cal;                int ba = calcBalance(sd, 2);                std::cout <<"平衡数："<< ba << endl;                //                bacance(onecup, twocup);                  int* p = &onecup;                int* p2 = &twocup;                difference(p, p2);                std::cout << "交换的值" << endl;                std::cout <<"\t 第一杯水"<< "\t第二杯水" << endl;                std::cout << "\t" << *p << "\t\t" << *p2 << endl;                bacancePoint(p,p2);                    std::cout << "第一杯水：" << isduBalanc(onecup) << endl;                std::cout << "第二杯水：" << isduBalanc(twocup) << endl;            }        catch (const std::exception&)        {            std::cout << "输入错误"<< endl;        }      }