test_heap/src/heap.h

#include <vector>
using namespace std;

template <class T>
class Heap
{
public:
    typedef int (*Compare)(T& , T& );

private:
    std::vector<T> data;
    Compare compare;

public:
    Heap()
    {
    }

    Heap(Compare _compare)
    {
        this->compare = _compare;
    }

    ~Heap()
    {
    }

    

    void push(T value)
    {
        unsigned long cur_idx = this->data.size();
        this->data.push_back(value);

        for (;cur_idx != 0;)
        {
            unsigned long push_idx = (cur_idx - 1) >> 1;
            T &push_value = this->data[push_idx];
            if (this->compare(value, push_value) > 0)
            {
                this->data[cur_idx] = push_value;
                cur_idx = push_idx;
            } else {
                break;
            }
        }

        this->data[cur_idx] = value;
    }
};