SIMPLE CALCULATOR

#include<stdio.h>
#include<stdlib.h>
int main()
{
int num1,num2;
char choice;
float res;
printf("enter the your choice\n");
scanf("%c",&choice);
printf("enter the first number\n");
scanf("%d",&num1);
printf("enter the second number\n");
scanf("%d",&num2);
switch(choice)
{
case'+' : res=num1+num2;
break;
case'-' : res=num1-num2;
break;
case'*': res=num1*num2;
break;
case'/' : res=(float)num1/(float)num2;
break;
case'%' : res=num1%num2;
break;
default : printf("invalid operation\n");
}
printf("result:%d %c %d = %f\n",num1,choice,num2,res);
return 0;
}

Output:

enter your choice
-
enter the first number
10
enter the second number
20
result:10 - 20 = -10.000000