fork download
copy 
  1. #include <iostream>
  2. class fake_int {
  3.   public:
  4.     int value;
  5.     fake_int(int i): value(i) {
  6.     }
  7.  
  8.     friend fake_int& operator+(fake_int& i) {
  9.       i.value += 100500;
  10.       return i;
  11.     }
  12.  
  13.     fake_int& operator=(const int right) {
  14.       value = right * 42;
  15.       return *this;
  16.     }
  17. };
  18.  
  19.  
  20. int main() {
  21. #define int fake_int
  22.    int a = 1;
  23.  
  24.    std::cout << "a = " << a.value << " after `a = 1;`" << std::endl;
  25.  
  26.    +a;
  27.  
  28.    std::cout << "a = " << a.value << " after `+a;`" << std::endl;
  29.  
  30.    return 0;
  31. }
Success #stdin #stdout 0s 3460KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
a = 1 after `a = 1;`
a = 100501 after `+a;`
https://ideone.com/pWd1Dy
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!