C++ Examples

Write a C++ Program to print a welcome text in a separate line.
Write a Program in C++ to add two numbers.
C++ program for addition of two numbers using functions.
Add two numbers in C++ using class.
Addition of two numbers using call by reference in C++
C++ program to write a program to add two numbers using call by value.
Swapping of two numbers in C++ without using third variable.
Swap two numbers in C++ using function.
C++ program to swap two numbers using class.
C++ program to swap two numbers using call by value.
C++ program to swap two numbers using pointers.
Write a program to swap private data members of two classes using friend function.
write a program to add data objects of two different classes using friend function.
Threading in C++.
C++ thread lambda
C++ thread lambda with parameter
C++ thread lambda pass by reference
Singleton C++ example

C++ program to swap two numbers using call by value.

#include <iostream>
using namespace std;

void swap(int, int);

int main()
{
    int num1,num2;
    cout<<"Enter the first number ";
    cin>>num1;
    cout<<"Enter the second number ";
    cin>>num2;
    
    cout<<"The numbers before swaping are "<<num1<<" "<<num2<<endl;
    
    swap(num1,num2);
    
    return 0;
}

void swap(int num1, int num2)
{
    int temp;
    
    temp =  num1;
    num1    =  num2;
    num2    =  temp;
    
    cout<<"The numbers after swapping are "<<num1<<" "<<num2<<endl;
}

Output

Enter the first number 45
Enter the second number 63
The numbers before swaping are 45 63
The numbers after swapping are 63 45