四則運算 itch case:break

 #include <stdio.h>

#include <stdlib.h>

int main(int argc, char *argv[]) 

{

while(1)

{

int num1,num2,op;

scanf("%d%c%d",&num1,&op,&num2);

float ans;

switch(op)

{

case '+':

ans=num1+num2;

printf("%.0f",ans);

break;

case '-':

ans=num1-num2;

      printf("%.0f",ans);

      break;

case '*':

ans=num1*num2;

printf("%.0f",ans);

break;

case '/':

ans=num1/num2;

printf("%.2f",ans);

break;

default:

printf("請輸入+-*/");

  }

    } 

return 0;

}