C++ Program for Number Swapping

A Few days back when I was in Delhi, one student asked me how to write a c Plus Plus program to swap two numbers by using the temp variable. I had make understand the logic behind this program to that student and said I will write this program for you.

This is a very simple & easy C++ (C Plus Plus) program for number swapping. In the below program, we swapped two numbers using the temporary variable.

#include <iostream>
using namespace std;

int main()
{
    int x = 5, y = 10, temp;

    cout << "Before swapping." << endl;
    cout << "x = " << x << ", y = " << y << endl;

    temp = x;
    x = y;
    y = temp;

    cout << "\nAfter swapping." << endl;
    cout << "x = " << x << ", y = " << y << endl;

    return 0;
}

#include <iostream>

using namespace std;

int main()

{

int x = 5, y = 10, temp;

cout << "Before swapping." << endl;

cout << "x = " << x << ", y = " << y << endl;

temp = x;

x = y;

y = temp;

cout << "\nAfter swapping." << endl;

cout << "x = " << x << ", y = " << y << endl;

return 0;

}

Swap two numbers without using third variable

#include<iostream.h>
#include<conio.h>

void main()
{
int a,b;
clrscr();
cout<<"Enter value of a: ";
cin>>a;
cout<<"Enter value of b: ";
cin>>b;
a=a+b;
b=a-b;
a=a-b;
cout<<"After swap a: "<<a<<"b: "<<b;
getch();
}

#include<iostream.h>

#include<conio.h>

void main()

{

int a,b;

clrscr();

cout<<"Enter value of a: ";

cin>>a;

cout<<"Enter value of b: ";

cin>>b;

a=a+b;

b=a-b;

a=a-b;

cout<<"After swap a: "<<a<<"b: "<<b;

getch();

}

Output is:

Before swapping.
x = 15, y = 10
After swapping.
x = 10, y = 15

If you like FreeWebMentor and you would like to contribute, you can write an article and mail your article to [email protected] Your article will appear on the FreeWebMentor main page and help other developers.

C++ Program for Number Swapping

Swap two numbers without using third variable

Output is:

Recommended Posts:

webmentor