C++ Program to swap two numbers without third variable.
C++ Program to Swap Two Numbers.

This Programs contains three different way to swap numbers in C++ programming.

 The first program uses swap two numbers without third variable using * and /, whereas the second program swap two numbers without third variable using + and - and third C++ program uses temporary variable to swap numbers.

C++ program uses swap two numbers without third variable using * and / .

SOURCE CODE:

 #include <iostream>  

/*  iostream provides basic

input and output services for C++ programs */

using namespace std;  

int main()

// Th execution of program start with the main function   

{  

int a=5, b=10;  

//Initialization is the process of assign the value to a variable      

cout<<"Number Before swap a= "<<a<<" b= "<<b<<endl;      

a=a*b; //(5*10)  a=50  

b=a/b; //(50/10) b=5    

a=a/b; //(50/5)  a=10

// cout is used to display the same statement in the output.   

cout<<"Number After swap a= "<<a<<" b= "<<b<<endl;      

return 0;  

}  

C++ program swap two numbers without third variable using + and - .

SOURCE CODE:

#include <iostream>

/*  iostream provides basic

input and output services for C++ programs */  

using namespace std;  

int main() 

// Th execution of program start with the main function  

{  

int a=5, b=10; 

//Initialization is the process of assign the value to a variable       

cout<<"Number Before swap a= "<<a<<" b= "<<b<<endl;   

// cout is used to display the same statement in the output.       

a=a+b; //(5+10)  a=15  

b=a-b; //(15-10)  b=5  

a=a-b; //(15-5)  a=10   

cout<<"Number After swap a= "<<a<<" b= "<<b<<endl;      

return 0;  

}  

C++ program uses temporary variable to swap numbers.

SOURCE CODE:

#include <iostream>

/*  iostream provides basic

input and output services for C++ programs */

using namespace std;

int main()

// Th execution of program start with the main function 

{

    int a = 5, b = 10, temp;

//Variable Declarations specify the type followed by the name

//Initialization is the process of assign the value to a variable  

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

    cout << "a = " << a << ", b = " << b << endl;

    temp = a; // temp=5

     

    a = b; // a = 10

    

    b = temp; // b = 10

    cout << "\nNumber After swapping." << endl;

    cout << "a = " << a << ", b = " << b << endl;

    return 0;

}