WAP to illustrate working of call-by-reference method of a function invoking.

/*

WAP to illustrate working of call-by-reference method of a function invoking.

*/

#include<iostream.h>

#include<stdlib.h>

int main()

{

      system ("cls");

      void change(int &);     //notice prototype

      int orig = 10;    //original value is 10.

      cout<<"The original value is: "<<orig<<"\n";

      change(orig);

      cout<<"Value after change() is over: "<<orig<<"\n";

      return 0;

}

void change(int &a)

{     a = 20;

      cout<<"Value of orig in function change() is: "<<a<<"\n";

      return;

}

OUTPUT