A program to demonstrate the concept of returning a reference

#include<iostream.h> 
 #include<conio.h> 
 char &change(int i); 
 char arr[50] = "Hello World"; 
 int main () 
 { 
      clrscr(); 
      change (5);  // simple call 
      cout<<arr<<endl; 
      change (5) = 'X'; // using function call as an Lvalue 
      cout<< arr; 
      getch(); 
      return 0; 
 } 
 char &change(int i) 
         { 
                return arr [i]; 
         }