Swapping numbers using call by reference

In this method we will make a function to swap numbers.

#include<stdio.h>

void swap(int*, int*);

main()

{

   int x, y;

   printf("Enter the value of x and y\n");

   scanf("%d%d",&x,&y);

   printf("Before Swapping\nx = %d\ny = %d\n", x, y);

   swap(&x, &y); 

   printf("After Swapping\nx = %d\ny = %d\n", x, y);

   return 0;

}

void swap(int *a, int *b)

{

   int temp;

   temp = *b;

   *b = *a;

   *a = temp;   

}