有没有一种简单的方法可以在 C++ 中创建最小堆?

2021-12-22 00:00:00 data-structures min heap c++

我对 C++ 很陌生，我想知道是否有办法从标准库中使用 C++ 生成最小堆.

I'm very new to C++, and I was wondering if there was a way to make a min heap in C++ from the standard library.

推荐答案

使用make_heap()和朋友，定义在中，或者使用priority_queue，定义在 中.priority_queue 使用 make_heap 和下面的朋友.

Use make_heap() and friends, defined in <algorithm>, or use priority_queue, defined in <queue>. The priority_queue uses make_heap and friends underneath.

#include <queue> // functional,iostream,ctime,cstdlib
using namespace std;

int main(int argc, char* argv[])
{
    srand(time(0));
    priority_queue<int,vector<int>,greater<int> > q;
    for( int i = 0; i != 10; ++i ) q.push(rand()%10);
    cout << "Min-heap, popped one by one: ";
    while( ! q.empty() ) {
        cout << q.top() << ' ';  // 0 3 3 3 4 5 5 6 8 9
        q.pop();
    }
    cout << endl;
    return 0;
}

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