试图让 REPEAT UNTIL (DO...WHILE) 循环在 C 中工作

Question

So I am writing this code for simple shape determining program, and I was trying to loop it, the condition, for the loop to end is when the value of the variable x is equal to 0 (all of teh variables are angels), since an angle cannot be 0, I think it is only logical to have the loop loop until the value entered is 0. However, the code does not seem to stop iterating even after the condition is met. the code is below:

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int x=0;
    int y=0;
    int A=0;
    do {
    printf("What is the value of x?");
    scanf("%d", &x);
    printf("What is the value of y?");
    scanf("%d", &y);
    printf("What is the value of A?");
    scanf("%d", &A);
    if ((A==90)&&(x==y))
        {
            printf("Square\n");
        }
    else if ((A==90)&&(x!=y))
        {
            printf("Rectangle\n");
        }
     else if ((A==60)||(A==120))
        {
            printf("Hexagonal\n");
        }
     else if ((A!=60)||(A!=120)&&(x==y))
        {
            printf("Rhombic\n");
        }
     else if ((A!=60)||(A!=120)&&(x!=y))
        {
            printf("Parallelogram\n");
        }
    else
    {
        printf("The values you have entered are not supported by the program, 
try again!");

    }
    }while(x!=0);
    printf("Thanks for using the program!");



    system("pause");
    return 0;
}

I cannot really see what the problem with the condition for the while loop is, please help!

Answer 1

The easiest way may be:

    scanf("%d", &x);
    if (!x) break;        // break the loop, not asking anything else