FunctorDemo

// ConsoleApplication4.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <vector>
#include <functional>
#include <algorithm>
#include <iostream>

class Animal
{
public:
    Animal();
    ~Animal();
    void live() { age += 5; };
    int getAge(){ return age; };
    int getMaxAge(){ return maxage; };
    bool dead() { return age > maxage; }
private:
    bool health;
    int age, maxage;
};

Animal::Animal()
{
    age = 0;
    maxage = 3650;
}

Animal::~Animal()
{
}

using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
    std::vector<Animal> zoopark(100);
    for (size_t i = 0; i < 100; i++)
    {
        if (i % 2) {
            for (size_t j = 0; j < 3000; j++)
            {
                zoopark[i].live();
            }
        }
    }
    cout << count_if(zoopark.begin(), zoopark.end(),
        mem_fun_ref(&Animal::dead));

    //std::cout << zoopark[1].getAge() << " " << zoopark[1].getMaxAge() << "\n";
    return 0;
}