c - 终止C语言程序

Question

有人可以帮我修改我的代码吗？ 我的程序没有终止。选择品牌后，它应该终止，但它会永远循环。

#include<stdio.h>
int main (void)
{
    int number,count=0 ;

    while (count<3)
    {
        printf("Menu:\n");
        printf("1.Proace\n");
        printf("2.Yonex\n");
        printf("3.Reebook\n");
        printf("0.Exit\n");
        printf("Enter your selection:");
        scanf("%d",&number);

        switch (number)
        {
        case 0:
            printf("exit.\n");
            break;
        case 1:
            printf("You have selected proace.\n");
            break;
        case 2:
            printf("You have selected yonex.\n");
            break;
        case 3:
            printf("You have selected reebook.\n");
            break;

        default:
            printf("Please try again.\n");
            exit(0);
        }
    }
    return 0;
}

Answer 1

我猜你误解了 switch 的 default 情况:只有当 number 不是 0,1,2,3 时才会执行它。 如果您想每次 case 0 1 2 3

退出一次 exit(0)

#include<stdio.h>
int main (void)
{
    int number,count=0 ;

    while (count<3)
    {
        printf("Menu:\n");
        printf("1.Proace\n");
        printf("2.Yonex\n");
        printf("3.Reebook\n");
        printf("0.Exit\n");
        printf("Enter your selection:");
        scanf("%d",&number);

        switch (number)
        {
        case 0:
            printf("exit.\n");
            exit(0);
            break;
        case 1:
            printf("You have selected proace.\n");
            exit(0);
            break;
        case 2:
            printf("You have selected yonex.\n");
            exit(0);
            break;
        case 3:
            printf("You have selected reebook.\n");
            exit(0);
            break;

        default:
            printf("Please try again.\n");
        }
    }
    return 0;
}

顺便说一句，更好的代码应该是

#include<stdio.h>
int main (void)
{
    int number;
    bool canExit = false;

    while (canExit == false)
    {
       canExit  = true;

        printf("Menu:\n");
        printf("1.Proace\n");
        printf("2.Yonex\n");
        printf("3.Reebook\n");
        printf("0.Exit\n");
        printf("Enter your selection:");
        scanf("%d",&number);

        switch (number)
        {
        case 0:
            printf("exit.\n");
            break;
        case 1:
            printf("You have selected proace.\n");
            break;
        case 2:
            printf("You have selected yonex.\n");
            break;
        case 3:
            printf("You have selected reebook.\n");
            break;

        default:
            printf("Please try again.\n");
            canExit = false;
        }
    }
    return 0;
}