while 循环和 if 和 else 语句

Question

#include <iostream>
using namespace std;

int main()
{
    int a, sumPositive, sumNegative;

    string promptContinue = "\n To continue enter 'y or Y', and to discontinue and get calculation result enter 'n or N' \n";

    string promptNum = "\nEnter a number : ";

    char response;

    cout << promptContinue;
    cin >> response;

    while (response = 'y'|'Y')
    {
        cout << promptNum;
        cin >> a;

        if(a >= 0 ){

            sumPositive += a;
        }
        else
            sumNegative += a;

        cout << promptContinue;
    }   

    cout << "Sum of all the positive numbers is : " << sumPositive <<endl;
    cout << "Sum of all the positive numbers is : " << sumNegative <<endl;

    return 0 ;
}

So what the program supposed to is: - Get user's input until user types 'n or N' to show a sign of stop - When user type in 'n or N' then the program sum of positive number as well as sum of negative numbers.

And what I've been getting

Permission denied
collect2.exe: error: ld returned 1 exit status
[Finished in 0.5s with exit code 1]

this error message, and I'm not sure what the problem is. Thank you in advance!

Answer 1

This line:

while(response = 'y' | 'Y' ){

Should be

while(response == 'y' || response == 'Y'){

The OR operator in C++ is a double line || , a single line | is typically used in scripting languages for piping multiple commands.

You were also using an assignment operator in a comparison, = instead of == , which was rejected by the compiler.