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  1.  
  2. #include  <stdio.h>
  3. int main(void)
  4. {
  5.     int    data1, data2;
  6.     char  op;
  7.     printf("请输入算式:\n");
  8.     scanf("%d %c %d", &data1, &op, &data2);  
  9.     switch(op)
  10.     {
  11.         case'+':
  12.             printf("%d+%d=%d\n",data1,data2,data1+data2);
  13.             break;
  14.         case'-':
  15.                     printf("%d-%d=%d\n",data1,data2,data1-data2);
  16.                     break;
  17.         case'*':
  18.                     printf("%d*%d=%d\n",data1,data2,data1*data2);
  19.                     break;
  20.         case'/':
  21.                     printf("%d/%d=%d\n",data1,data2,data1/data2);
  22.                     break;  
  23. default :
  24.     printf("不合法的字符");                         
  25.     }
  26.     return 0;
  27. }
Success #stdin #stdout 0s 5320KB
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请输入算式:
不合法的字符
https://ideone.com/AWYoX8
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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