将比较器传递给声明为类成员的priority_queue

#include <queue>

class MyComparator {
public:
    bool operator()(int a, int b) {
        // 自定义比较器，按照从小到大的顺序排列
        return a > b;
    }
};

class MyClass {
private:
    std::priority_queue<int, std::vector<int>, MyComparator> pq;

public:
    void addToPriorityQueue(int value) {
        pq.push(value);
    }

    int getTopOfPriorityQueue() {
        return pq.top();
    }
};

int main() {
    MyClass obj;
    obj.addToPriorityQueue(5);
    obj.addToPriorityQueue(2);
    obj.addToPriorityQueue(8);

    int top = obj.getTopOfPriorityQueue();
    // 输出：2
    std::cout << top << std::endl;

    return 0;
}