c - 在 C 中要求用户重复该程序或退出

Question

在这个非常基本的程序中，要求用户输入两个数字，然后程序将这些数字相加。我想在最后询问用户是否想再次重复该程序或退出该程序!例如，如果他/她按 y，程序将要求用户输入两个数字，否则程序将关闭。怎么做？

main(){
float x,y,sum;
printf ("Enter the first number:");
scanf ("%f",&x);
printf ("Enter the second number:");
scanf ("%f",&y);
sum=x+y;
printf ("The total number is:%f",sum);
}

Answer 1

main(){
    float x,y,sum;
    char ch;

    do{
    printf ("Enter the first number:");
    scanf ("%f",&x);
    printf ("Enter the second number:");
    scanf ("%f",&y);
    sum=x+y;
    printf ("The total number is:%f",sum);
    printf ("Do you want to continue: y/n");
    scanf (" %c", &ch);
    } while(ch == 'y');
    }

或者您也可以尝试这个:

main(){
    float x,y,sum;
    char ch;

    do{
    printf ("Enter the first number:");
    scanf ("%f",&x);
    printf ("Enter the second number:");
    scanf ("%f",&y);
    sum=x+y;
    printf ("The total number is:%f",sum);
    printf ("Do you want to continue: y/n");
    ch = getchar();
    getchar();
    } while(ch == 'y');
    }