C Program to swap two numbers using Pointers

by Krishna

Posted on 27 Jun 2018 Category: C Views: 1305

 C Program to swap two numbers using Pointers

In this sectionwe will write a C program to swap two numbers using Pointers.

#include <stdio.h>

// function to swap the two numbers
void swap(int *x,int *y)
{
    int t;
     t   = *x;
    *x   = *y;
    *y   =  t;
}

int main()
{
    int a,b;

    printf("Enter the first number: ");
    scanf("%d",&a);
    printf("Enter the second number: ");
    scanf("%d",&b);

    //displaying numbers before swapping
    printf("Before Swap: a = %d, b= %d\n",a,b);

    //calling the user defined function swap()
    swap(&a,&b);

    //displaying numbers after swapping
    printf("After  Swap: a= %d, b=%d\n",a,b);

    return 0;
}

OUTPUT