C++ program to illustrate working of call by reference method

Here is a C++ program to illustrate working of call by reference method


 SOURCE CODE OUTPUT

#include<iostream>
using namespace std;
void value(int &x)
{
    x=20;
    cout<<"Value of x in function : "<<x<<endl;
}
int main()
{
    int x=10;
    cout<<"Value of x before function call : "<<x<<endl;
    value(x);
    cout<<"Value of x after function call : "<<x;
    return 0;
}

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