#include <stl.h> #include <iostream.h>

int odd (int a_) { return a_ % 2; }

int main () { vector <int> numbers(100); for (int i = 0; i < 100; i++) numbers[i] = i % 3; int elements = 0; count_if (numbers.begin (), numbers.end (), odd, elements); cout << "Found " << elements << " odd elements." << endl; return 0; }