1.可复用的完整实例#include <iostream> #include <thread> #include <mutex> using namespace std;//全局变量，有待改进！ int cnt = 20; mutex m;void t1()//普通函数，用来执行线程 {lock_guard<mutex> lock(m);while(cnt>0){--cnt;//cout << "t1111111\n";//cout << "t111111" << endl;cout << cnt << endl;} }void t2()//普通函数，用来执行线程 {lock_guard<mutex> lock(m);while(cnt>0){--cnt;//cout << "t2222222\n";//cou...