Courses

# Program to swap two numbers using pointer

0 Suresh Chand April 2, 2021

In this example, You will learn to swap two numbers using pointer. Here, We will use 5 variables. 3 of them are integer variables and 2 of them are pointer variables.

Before going through this example, You must have knowledge in following topics

Here, First we will take 2 input from user and stored in integer variables.

We will assign address of that variables to the pointer variables as like

``````a = &x;
b = &y;``````

Then we will assign pointer of a variable to temp variable.

``temp = *a;``

Again, We will assign pointer variable of b to pointer variable of a.

``*a = *b``

Finally, We will assign value of temp variable to pointer variable of a.

``*b = temp;``

On this way, Our program works and two numbers are swap using pointers.

Lets look an code for detail explanation.

## Code: swap two numbers using pointer

``````#include<iostream>
using namespace std;

int main() {

int x, y, temp;
int *a, *b;

cout << "Enter two numbers:";
cin >> x>>y;

a = &x;
b = &y;

temp = *a;
*a = *b;
*b = temp;

cout << "After swap x is:" << x;
cout << "\nAfter swap y is:" << y;

return 0;
}``````

The output of above code is

Subscribe
Notify of
Inline Feedbacks