C Program to swap two numbers using pointers and function.

C Program to swap two numbers using pointers and function.  

#include <stdio.h>

void swap(int *a,int *b);

int main()
{
  int num1=5,num2=10;

  swap(&num1,&num2);
       /* address of num1 and num2 is passed to swap function */
  
  printf("Number1 = %d\n",num1);
  printf("Number2 = %d",num2);
  
  return 0;
}

void swap(int *a,int *b)
{
 /* pointer a and b points to address of num1 and num2 respectively */
  int temp;
  temp=*a;
  *a=*b;
  *b=temp;
}