如何修复此无限循环以及我的代码中的其他问题？

Question

以下是我的作业链接：http://prnt.sc/e9q619

如果满足，交换机中的默认值将变为无限循环，而且我也无法从分配中执行其他重要注释。当我去另一个导师时，他试图告诉我使用我们尚未在课堂上学习的方式使用向量和字符串，所以如果使用的'c'和'x'没有固定就没关系。

    #include <iostream>
#include <stdlib.h>

using namespace std;


int main()
{
    int i = 1;
    int Num1 = 1;
    int Num2 = 1;
    char operation;
    int answer = 1;

    cout << "Here is a four function integer calculator." << endl;
    cout << "Please use 'x' to exit the calculator, and 'c' to clear the calculator in the operator space. E.G. ""1 x 3"" would exit the calculator." << endl;
    cout << "Enter the first number, operation, and second number in respective order, separated by a space each." << endl;


    while (i > 0)
    {
        cin >> Num1 >> operation >> Num2;
        switch (operation)
        {
        case '+':
            answer = Num1 + Num2;
            cout << "The solution is: " << answer << "." << endl;
            break;
        case '-':
            answer = Num1 - Num2;
            cout << "The solution is: " << answer << "." << endl;
            break;
        case '*':
            answer = Num1 * Num2;
            cout << "The solution is: " << answer << "." << endl;
            break;
        case '/':
            if (Num2 == 0 && operation != 'x') {
                break;
            }
            else {
                answer = Num1 / Num2;
                cout << "The solution is: " << answer << "." << endl;
            }
            break;
        case 'c':
            system("cls");
            break;
        case 'x':
            return 0;
            break;
        default:
            cout << "You entered a wrong number, operator, or form for the entire operation" << endl;
            break;
        }
    }
    cout << "The solution is: " << answer << "." << endl;
}

Answer 1

所以我所做的是我单独检查每个输入并编写输入验证语句。

#include<iostream>
#include<stdlib.h>
using namespace std;

int main()
{
    int i = 1;
    int Num1 = 1;
    int Num2 = 1;
    char operation;
    int answer = 1;

    cout << "Here is a four function integer calculator." << endl;
    cout << "Please use 'x' to exit the calculator, and 'c' to clear the calculator in the operator space. E.G. ""1 x 3"" would exit the calculator." << endl;
    cout << "Enter the first number, operation, and second number in respective order, separated by a space each." << endl;


    while (i > 0)
    {
        cout << "Enter Num1: " << endl;
        cin >> Num1;
        cout << "Enter operation: " << endl;
        cin >> operation;
        cout << "Enter Num2: " << endl;
        cin >> Num2;

        while (operation != '+' && operation != '-' && operation != '*' && operation != '/')
        {
            cout << "You Suck. Try again." << endl;
            cout << "Enter Num1: "  << endl;
            cin >> Num1;
            cout << "Enter operation: " << endl;
            cin >> operation;
            cout << "Enter Num2: " << endl;
            cin >> Num2;
        }

        switch (operation)
        {
        case '+':
            answer = Num1 + Num2;
            cout << "The solution is: " << answer << "." << endl;
            break;
        case '-':
            answer = Num1 - Num2;
            cout << "The solution is: " << answer << "." << endl;
            break;
        case '*':
            answer = Num1 * Num2;
            cout << "The solution is: " << answer << "." << endl;
            break;
        case '/':
            if (Num2 == 0 && operation != 'x') {
                break;
            }
            else {
                answer = Num1 / Num2;
                cout << "The solution is: " << answer << "." << endl;
            }
            break;
        case 'c':
            system("cls");
            break;
        case 'x':
            return 0;
            break;
        default:
            cout << "You entered a wrong number, operator, or form for the entire operation" << endl;
            break;
        }
    }
    cout << "The solution is: " << answer << "." << endl;
}