当我按0时，为什么我的程序不能停止？ C程序

我做了一个简单的程序，问你是否可以进入酒吧，如果你的年龄。然后继续问你愿意花多少钱，并在询问你第一次购买多少钱后。它继续询问您是否想要购买更多，但是如果我不想购买更多，我可以输入值“0”，但是当输入“0”时它不会关闭程序。当我按0时，为什么我的程序不能停止？ C程序

的代码如下：

#include <stdio.h> 

int main() { 
int age, legal = 18; 
float money, buy; 

    printf("At the bar the security must ID the customers that look underage, what is your age?: "); 
    scanf("%d", &age); 

     if(age < legal){ 
      printf("\nYou are not allowed!\n"); 
     } 

     else if(age >= legal){ 
      printf("\nYou may enter, and buy whatever you wish!\n"); 

      printf("\nHow much money are you willing to spend tonight?: "); 
      scanf("%f", &money); 

      printf("\nWith the %.2f dollars you want to spend tonight what is the price of food or beverage you wish to buy first?: ", money); 
      scanf("%f", &buy); 

      money = money - buy; 

      while(money > 0 || buy==0) { 
       printf("\nYou now have %.2f dollars remaining, what else would you like to buy? (Press 0 to stop if you don't wish to buy any more!!): ", money); 
       scanf("%f", &buy); 
       money = money - buy; 
      } 
       if(money == 0){ 
        printf("\nYou have spent all the money that you wished to spend at the bar, we hope you enjoyed your stay!!\n"); 
       } 

       else if(money > 0){ 
        printf("\nYou still have %.2f dollars left, We hope you enjoyed your stay at the bar!!\n"); 
       } 

     }  
}

来源

2015-06-27 Asad Mahmood

请避免使用'float'或'double'作为金钱，因为它们会给出不精确的比较。使用'int'工作在美分，格式为* dollars.cents *作为输出。拆分'.'上的任何输入字符串将其转换为分。 –

while循环是错误的。它说，虽然钱不是零，或者当购买零时，要求支出金额。

应该说：“虽然（钱！= 0 & &团购> 0）”，所以只要他们有钱，并且花钱（买大于零），它会问消费金额。

来源

2015-06-27 18:09:46

当我按0时，为什么我的程序不能停止？ C程序

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