fork download 
  1. #include <iostream>
  2. #include <functional>
  3.  
  4. int f() {
  5.     std::cout << "Here is f" << std::endl;
  6.     return 5;
  7. }
  8.  
  9. int g(std::function<int()> a) {
  10.     int x = a();
  11.     int y = 2 * a();
  12.     return x + y;
  13. }
  14.  
  15. int main() {
  16.     int z = g(f);
  17.     std::cout << "main: z = " << z << std::endl;
  18. }
  19.  
Success #stdin #stdout 0s 4400KB
comments (?)
stdin 
Standard input is empty
stdout 
Here is f
Here is f
main: z = 15
https://ideone.com/gvztSJ
language:
C++14 (gcc 8.3)
created:
7 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!