Call_By_Reference.cpp

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// CALL BY REFERENCE

#include <iostream>

using namespace std;

void swap(int *x, int *y)
{
    // Local Variables
    int temp = *x;
    *x = *y;
    *y = temp;
    
    cout<<"x:"<<*x<<" y:"<<*y;
}

int main()
{
    cout<<"Before Swapping: ";
    int a=10,b=20;   // Global Variables
    cout<<"a:"<<a<<" b:"<<b;
    
    cout<<"\nAfter Swapping: ";
    swap(&a,&b);       // Pass by address
    cout<<" a:"<<a<<" b:"<<b;

    return 0;
}