c - C 中的退出选项

Question

我知道这是一段非常愚蠢的代码，它只是让我尝试了解事情...我认为我做得还不错，(除了没有正确缩进)

但我正在努力为用户提供使用“Q”字符退出程序的选项，但似乎无法做到正确？

有人能帮忙吗..

#include <stdio.h>
#define YEAR 2015

int main()
{
    int yearBorn, age, ageLimit,years;
    char quit = 'Q';

    ageLimit=16;

    do // The program will continue running until the user enters an age greater than 16 or presses the 'Q' character
       // to quit the program
    {        
        printf("\nPlease Enter The Year You Were Born: ");
        scanf(" %d", &yearBorn);

        age= YEAR-yearBorn;
        years=ageLimit-age;

        if (yearBorn==YEAR) //This IF statement will run if the user enters the current year!
        {
            printf("Please double check your entry as it seems ");
            printf("that you havent been born yet?");

        }
        else if (age<=ageLimit) //If the users age is less than 16 program prints the following messages
        {
            printf("\nYou are too young to play the Lottery!\n");
            printf("you have to wait %d year%s before you can play!\n\n",years,(years!=1) ? "s" : " ");

            printf("You are %d\n",age);    
        }    
    }while (years>=1);

    age = YEAR-yearBorn;    
    printf("You're old enough.. for heavens sake you are %d years old \n", age);

    return 0;
}

Answer 1

只需声明一个类型为 char 的 opt 变量并将其添加到 } while (years>1); 行之前:

printf ("Press %c and ENTER to quit, or just ENTER to repeat: ", quit);
do
  opt = getchar();
while (opt!=quit && opt!='\n');
if (opt==quit)
  break;

为避免总是执行最后一个 printf，将其包含在 if 语句中

if (opt!=quit)
{
    age = YEAR-yearBorn;    
    printf("You're old enough.. for heavens sake you are %d years old \n", age);
}