當我按0時，爲什麼我的程序不能停止？ C程序

我做了一個簡單的程序，問你是否可以進入酒吧，如果你的年齡。然後繼續問你願意花多少錢，並在詢問你第一次購買多少錢後。它繼續詢問您是否想要購買更多，但是如果我不想購買更多，我可以輸入值「0」，但是當輸入「0」時它不會關閉程序。當我按0時，爲什麼我的程序不能停止？ C程序

的代碼如下：

#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"); 
       } 

     }  
}

來源

2015-06-27 Asad Mahmood

請避免使用'float'或'double'作爲金錢，因爲它們會給出不精確的比較。使用'int'工作在美分，格式爲* dollars.cents *作爲輸出。拆分'.'上的任何輸入字符串將其轉換爲分。 –

while循環是錯誤的。它說，雖然錢不是零，或者當購買零時，要求支出金額。

應該說：「雖然（錢！= 0 & &團購> 0）」，所以只要他們有錢，並且花錢（買大於零），它會問消費金額。

來源

2015-06-27 18:09:46

當我按0時，爲什麼我的程序不能停止？ C程序

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