multiset 用法

头文件

#include <set>

代码

#include <set>
#include <iostream>

using namespace std;

int main() {
	multiset <int> ms;
	
	ms.insert(1);
	ms.insert(5);
	ms.insert(5);
	ms.insert(5);
	ms.insert(2);
	ms.insert(1);
	
	for (auto iter = ms.begin(); iter != ms.end(); iter++){
		cout << *iter << endl;
	}
	cout << "end" << endl;
	
	auto iter = ms.find(5);
	cout << *iter << endl;
	ms.erase(iter);
	
	cout << "end" << endl;
	
	int num = ms.count(5);
	cout << "find 5 num is " << num << endl;
	cout << "end" << endl;
	
	for (auto iter = ms.begin(); iter != ms.end(); iter++){
		cout << *iter << endl;
	}
	
	return 0;
};

输出

1
1
2
5
5
5
end
5
end
find 5 num is2
end
1
1
2
5
5

资料：
https://blog.csdn.net/culing2941/article/details/108617870