fork(3) download
copy 
  1. #include <algorithm>
  2. #include <functional>
  3. #include <iostream>
  4. #include <vector>
  5. using namespace std;
  6.  
  7. bool IsEven(int n) {
  8.     return (n % 2) == 0;
  9. }
  10.  
  11. int main() {
  12.     // Test vector
  13.     vector<int> vec{ 11, 22, 33, 44, 55 };
  14.  
  15.     // Using functional approach
  16.     auto n = count_if(vec.begin(), vec.end(),
  17.          bind(logical_not<bool>(),
  18.              bind(modulus<int>(), placeholders::_1, 2)));    
  19.     cout << n << endl;
  20.  
  21.     // Using lambdas
  22.     n = count_if(vec.begin(), vec.end(), 
  23.                  [](int n) { return (n % 2) == 0; });
  24.     cout << n << endl;
  25.  
  26.     // Using boolean returning ad hoc function
  27.     n = count_if(vec.begin(), vec.end(), IsEven);
  28.     cout << n << endl;
  29. }
  30.  
Success #stdin #stdout 0s 3472KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
2
2
2
https://ideone.com/rjkQEZ
language:
C++14 (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!