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;
}

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