//  File: ref1.C
//  
//  using references

#include <stdio.h>

main() {
   int x = 3, y = 9 ;
   int &ref = x ; // initialize reference

   printf("x = %d, ref = %d\n", x, ref) ; 
   x = 5 ;
   printf("x = %d, ref = %d\n", x, ref) ; 
   ref = 7 ;
   printf("x = %d, ref = %d\n", x, ref) ; 
   ref = y ;
   printf("x = %d, ref = %d\n", x, ref) ; 
}