July树树

若使用mutex.lock()方法时std::cout出现异常，则会导致mutex无法释放。改用std::lock_guard可有效避免该情况发生。#include <iostream> #include <thread> #include <string> #include <mutex> using namespace std;std::mutex mu;// 对资源加锁 /// 用lock若c

用class对std::ofstream进行封装。#include <iostream> #include <thread> #include <string> #include <mutex> #include <fstream> using namespace std;class LogFile { public: LogFile() { f.open(