1.Write a program to add, subtract, multiply and divide two integers using user defined type functio

//1.Write a program to add, subtract, multiply and divide two integers using user defined type function with return type.//



#include <stdio.h>

int add(int a, int b);
int sub(int a, int b);
int mul(int a, int b);
int div(int a, int b);

void main()
{
 int x,y,op;

 printf("Enter two integers \n");
 scanf("%d %d",&x,&y);

 printf("Enter the operation to be execute \n Choose: \n 1 for addition \n 2 for subtraction \n 3 for multiplication \n 4 for division \n");
 scanf("%d",&op);

 switch(op)
 {
  case 1:
  printf("The sum is %d \n",add(x,y));
  break;

  case 2:
  printf("The difference is %d \n",sub(x,y));
  break;

  case 3:
  printf("The product is %d \n",mul(x,y));
  break;

  case 4:
  printf("%d divided by %d = %d \n",x,y,div(x,y));
  break;

  default:
  printf("Error");
  break;
  }

 }

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

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

 int mul(int a, int b)
 {
  return(a*b);
 }

 int div(int a,int b)
 {
  return(a/b);
 }