C++ thread多线程读写锁应用

#include 
#include 
#include 
#include 
#include 
#include 
const int N = 100;
using namespace std;
shared_mutex m;
class W_R 

{public:
		void input();
		void output();
		 
private:queueRecv;

};
void W_R::input()
{
	for (int i = 0; i < N; i++)
	{
		unique_lock lock(m);
		cout << "插入一个元素" << i< lock(m);
			cout << "线程" << this_thread::get_id() << "读取一个元素" << endl;
			cout << Recv.back() << endl;
			//Recv.pop();
			
		}

		else cout << "队列已空，无法取出元素" << endl;
	}
	cout << "end" << endl;
}
int main()
{
	W_R a;
	thread in(&W_R::input,&a);
	thread out1(&W_R::output,&a);
	thread out2(&W_R::output, &a);
	in.join();
	out1.join();
	out2.join();
	return 0;
}