【問題】C++

[B 10]

#include<stdio.h>
#include<math.h>

int sum(int x,int y);
[COLOR="Red"]{[/COLOR](他說這邊錯了!)
    switch(user)
    {
    case 1:
         printf("1");
         break;    
    case 2:
         break'
    case 3:
         break;
    case 4:
         break;   
    }
    return total
}


main()
{
      int user;
      int num1,num2;
      int total;

      printf("請輸入兩個數值:");
      scanf("%d",&user);

      printf("請先選擇功能:(+請按1，-請按2，*請按3，/請按4，次方請按5)");
      scanf("%d",&num1);
      scanf("%d",&num2);

      int sum(int a,int b);
      printf("total");

      system("pause");
      }

到底哪裡錯了?有點急，謝謝

[john0312 10]

int sum(int x,int y); // Declaration

int sum(int x,int y) // Implementation
{
    switch(user)
    {
    case 1:
         printf("1");
         break;    
    case 2:
         break'
    case 3:
         break;
    case 4:
         break;   
    }
    return total
}

Fixed.

EDIT:

PS:

I suggest getchar() to replace system("pause");

For two reasons:

- Better compatibility ( Works on not only Windows. )

- Faster ( system invokes another process )

[B 10]

謝謝。

不過我不太懂getchar()。

其他的小錯誤也OK了!