Question

这是我编写的代码：

#include <stdio.h>
#include <string.h>

int main(void) {
   char userService1[50];
   char userService2[50];

   int price1;
   int price2;


   printf("Davy's auto shop services\n\n");
   printf("Select first service:\n");
   fgets(userService1,13,stdin);
   printf("Select second service:\n\n");
   fgets(userService2,13,stdin);
   printf("Davy's auto shop invoice\n\n");

   if(strcmp(userService1,"Oil change") == 0){
    printf("Service 1: Oil change, $35\n"); 
    price1 = 35; 
   }

   else if(strcmp(userService1,"Tire rotation") == 0){
    printf("Service 1: Tire rotation, $19\n"); 
    price1 = 19;
   }

   else if(strcmp(userService1,"Car wash") == 0 ){
    printf("Service 1: Car wash, $7\n");
    price1 = 7;
   }

   else if(strcmp(userService1,"Car wax") == 0 ){
    printf("Service 1: Car wax, $12\n");  
    price1 = 12;
   }

   else{
      printf("Service 1: No service\n");
      price1 = 0;
   }

   if(strcmp(userService2,"Oil") == 0){
      printf("Service 2: Oil change, $35\n\n");
      price2 = 35;
   }

   else if(strcmp(userService2,"Tire") == 0 ){
      printf("Service 2: Tire rotation, $19\n\n");
      price2 = 19;
   }

   else if(strcmp(userService2,"Car") == 0 ){
      printf("Service 2: Car wash, $7\n\n");
      price2 = 7;
   }

   else if(strcmp(userService2,"Car") == 0 ){
      printf("Service 2: Car wax, $12\n\n");
      price2 = 12;
   }
   else{
      printf("Service 2: No service\n\n");
      price2 = 0;
   }

   int price = price1 + price2;
   printf("Total: $%d\n", price);
   return 0;
 }

这是当前版本输出的内容：

Davy's auto shop services
Oil change -- $35
Tire rotation -- $19
Car wash -- $7
Car wax -- $12

Select first service:
Select second service:

Davy's auto shop invoice

Service 1: No service
Service 2: No service

Total: $0

输入：

 Oil change 
 Car wax

这是代码的期望输出：

Davy's auto shop services
Oil change -- $35
Tire rotation -- $19
Car wash -- $7
Car wax -- $12

Select first service:
Select second service:

Davy's auto shop invoice

Service 1: Oil change, $35
Service 2: Car wax, $12

Total: $47

我不确定是否使用fgets()正确分配了字符串，或者不确定是否正确比较了字符串。无论哪种方式，我都不知道如何解决。

Answer 1

问题在于fgets在字符串末尾读取“ \ n”

一种快速的解决方法是将其包括在您的比较中：

Directory not empty @ dir_s_rmdir

或者您也可以像这样完全切掉“ \ n”：

Install

两种解决方案都能达到预期的效果。

不比较字符串？还是输入正确？

1 个答案: