From: Simon Krahnke <overlord@...>
Date: 2009-11-01T02:35:42+09:00
Subject: Re: Ruby doesn't implement x++ for Fixnum's because ???

* Robert Klemme <shortcutter@googlemail.com> (23:19) schrieb:

> Yes - and in C++ you can have it otherwise:
>
> robert@fussel:~$ g++ x.cc && ./a.out
> a++=1
> a=2
> b=2
> robert@fussel:~$ cat x.cc
>
> #include <stdio.h>
>
> int main( int argc, const char* argv[] )
> {
>   int a = 1;
>   int &b = a;
>   printf("a++=%d\n", a++);
>   printf("a=%d\n", a);
>   printf("b=%d\n", b);
>   return 0;
> }

No, you can't:

$ ./ab
a: 2 @ 0xbfe413f8
b: 2 @ 0xbfe413f8

$ cat ab.cc
#include <iostream>

int main(void) {
  int a = 1;
  int &b = a;
  a++;
  std::cout << "a: " << a << " @ " << &a << std::endl;
  std::cout << "b: " << b << " @ " << &b << std::endl;
  return 0;
}

There is only one variable, b is just another name for it.

mfg,                       simon .... l