我找不到的编译器错误 [英] Compiler error which I am unable to locate

问题描述

我遇到了无法解决的错误。我已经彻底检查了代码，但没有成功。我究竟做错了什么？参见下面的代码。

I'm getting an error which I am not able to resolve. I've gone through my code thoroughly with no success. What am I doing wrong? See code below.

编译器错误：

In function 'main':
ou1.c:49:1: error: expected 'while' before 'printf'
 printf("End of program!\n");
 ^

我的代码：

#include <stdio.h>

int main(void){

int choice;
float price, sum, SUMusd;
float rate =1;

printf("Your shopping assistant");


do{

printf("1. Set exchange rate in usd (currency rate:%f)\n", rate);
printf("2. Read prices in the foreign currency\n");
printf("3. End\n");
printf("\n");
scanf("%d", &choice);

switch(choice){
case 1:
printf("Give exchange rate: \n");
scanf("%f", &rate);
break;

case 2:

do{

printf("Give price(finsh with < 0)\n");
scanf("%f", &price);

sum =+ price;

}while(price <= 0);

SUMusd = sum*rate;


printf("Sum in foreign currency: %f", sum);
printf("Sum in USD:%f", SUMusd);
break;

default:
printf("Invalid choice\n");
break;
}while(choice != 3);
}
printf("End of program!\n");



  return 0;
}

推荐答案

开关的花括号需要在while循环终止之前关闭该语句。

The curly braces of the switch statement need to be closed before the while loop termination.

printf（ Invalid choice\n）;
休息时间；
}
} while（choice！= 3）;
printf（程序结束！\n）;

更正的完整代码示例

#include <stdio.h>

int main(void){

int choice;
float price, sum, SUMusd;
float rate =1;

printf("Your shopping assistant");


do{

printf("1. Set exchange rate in usd (currency rate:%f)\n", rate);
printf("2. Read prices in the foreign currency\n");
printf("3. End\n");
printf("\n");
scanf("%d", &choice);

switch(choice){
case 1:
printf("Give exchange rate: \n");
scanf("%f", &rate);
break;

case 2:

do{

printf("Give price(finsh with < 0)\n");
scanf("%f", &price);

sum =+ price;

}while(price <= 0);

SUMusd = sum*rate;


printf("Sum in foreign currency: %f", sum);
printf("Sum in USD:%f", SUMusd);
break;

default:
printf("Invalid choice\n");
break;
}
}while(choice != 3);

printf("End of program!\n");



  return 0;
}

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