C++ 循环查找用户输入的最小值、最大值、平均值和总和

Question

我被要求编写一个程序来查找用户输入的最小值、最大值、平均值和总和，我想出了以下程序，但我使用的循环似乎有问题，因为程序刚刚退出编译时。有人可以将错误指出给我吗？非常感谢。

#include "stdafx.h"
#include <iostream>

using namespace std;

int main()
{
    bool empty = true;
    int max, min, count, avg, sum=0;
    char choice;

    for (count = 0; count++;)

    {

        do
        {
            cout << "Enter a number: ";

            int num;
            cin >> num;

            if (empty)
            {
                empty = false;
                min = num;
                max = num;
            }
            else if (max < num)
            {
                max = num;
            }
            else if (num < min)
            {
                min = num;
            }

            sum = sum + num;

            avg = sum / count;

            cout << "Do you want to continue?: ";
            cin >> choice;
        } while (choice == 'y' || choice == 'Y');

        if (!empty)
        {
            cout << " Maximum is " << max << endl;
            cout << " Minimum  is " << min << endl;
                    cout << " Sum is " << sum << endl;
            cout << " Average is " << avg << endl;
        }
    }
    return 0;
}

Answer 1

您的 for 循环不正确:

for (count = 0; count++;)

记住 for 循环是:

for (initialization; expression; update)

count++ 将 count 加 1 但返回其原始值 0，该值被转换为 false。因为 expression 为假，循环停止。