fork(1) download 
  1. #include <tr1/unordered_map>
  2. #include <boost/bind.hpp>
  3. #include <boost/lambda/lambda.hpp>
  4. #include <iostream>
  5. #include <algorithm>
  6. struct A {int x; int y; };
  7. int main()
  8. {
  9.     typedef std::tr1::unordered_map<int, A> map_t;
  10.     map_t m;
  11.     A a1 = {1, 100}; 
  12.     m[1] = a1;
  13.     A a2 = {10, 101};
  14.     m[2] = a2;
  15.     A a3 = {-1, 42};
  16.     m[1000] = a3;
  17.  
  18.     A max_a = max_element(m.begin(), m.end(),
  19.                     bind(&A::x, bind(&map_t::value_type::second, _1))
  20.                   < bind(&A::x, bind(&map_t::value_type::second, _2))
  21.              )->second;
  22.  
  23.      std::cout << "The max A::x was found in {" << max_a.x << ", " << max_a.y << "}\n";
  24.  
  25. }
  26.  
Success #stdin #stdout 0s 2860KB
comments (?)
stdin 
Standard input is empty
stdout 
The max A::x was found in {10, 101}
https://ideone.com/V6SZL
language:
C++ (gcc 8.3)
created:
13 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!