#include<stdio.h>
#include<stdbool.h>
#include<conio.h>
#include<math.h>
#include<string.h>

void main()
{
   int num1, num2, sum;
   char math;
   printf("Enter num 1: ");
   scanf("%d", &num1);
   printf("enter num 2: ");
   scanf("%d", &num2);
   fflush(stdin);
   printf("Enter calculation : ");
   scanf("%C", &math);
   switch(math)
   {
       case '+':
       sum = add(num1, num2);
       printf("%d + %d = %d",num1 ,num2, sum);
       break;
       case '-':
       sum = sub(num1, num2);
       printf("%d - %d = %d",num1 ,num2, sum);
   }




}

int add(int a, int b)
{
     int sum;
     sum = a + b;
    return sum;
}

int sub(int a, int b)
{
    int sum;
    a - b;
    return sum;
}