#include<iostream>
#include<thread>
using namespace std;
void function_1()
{
std::cout << "Hello,world!" << std::endl;
}
class Fctor { //仿函数
public:
void operator()() { //对()进行重载
for (int i = 0; i > -100; i--) {
cout << "from t1 " << i << endl;
}
}
};
int main() {
//Fctor fct;
std::thread t1((Fctor())); //t1 starts running. 实例化一个线程对象t1
try {
for (int i = 0; i < 100; i++)
cout << "from main: " << i << endl;
}
catch (...) {
t1.join();
throw;
}
t1.join();
//t1.detach();
return 0;
}
其中这句 std::thread t1((Fctor())); 为什么要再“Fctor()”两边还要加括号?否则“ t1.join();”这句会提示错误??
还有能解释下执行结果吗?