Program Of Call By Refrence In C++

#include<iostream.h>

#include<conio.h>

    int sum(int &x,int &y);  // Function Delaration

main()

{

clrscr();

int a,b,c;

cout<<"Enter First NUmber=";

cin>>a;

cout<<"Enter Second NUmber=";

cin>>b;

c=sum(a,b);                 // Function CAlling

cout<<"\n Address of a"<<&a;

cout<<"\n NAswer="<<c;

getch();

}

int sum(int &x,int &y)    // Function Define

{

int  z;

cout<<"\n Address &x"<<&x;

z= x +  y;

return z;

}

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In call by reference, a function passes a reference as an argument to another function. In this case the called function works on the callers copy of parameters and not on a local copy. Before the discussion of call by reference we must know what is a reference.