【发布时间】:2019-03-24 21:54:25
【问题描述】:
我正在尝试启动一个线程:
#include <iostream>
#include <fstream>
#include <string>
#include <thread>
void function(int p1, int p2, int p3){
std::cout<<p1<<p2<<p3<<std::endl;
}
int main(int argc, char const *argv[]) {
std::cout<<"starting"<<std::endl;
std::thread t(function, 1, 2, 3);
std::cout<<"created thread"<<std::endl;
t.join();
std::cout<<"end"<<std::endl;
return 0;
}
我的编译器告诉我这个:
doesntwork.cpp:12:15: error: no matching constructor for
initialization of 'std::thread'
std::thread t(function, 1, 2, 3);
^ ~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/usr/include/c++/v1/thread:408:9: note:
candidate constructor template not viable: requires single
argument '__f', but 4 arguments were provided
thread::thread(_Fp __f)
^
/Library/Developer/CommandLineTools/usr/include/c++/v1/thread:289:5: note:
candidate constructor not viable: requires 1 argument, but 4
were provided
thread(const thread&);
^
/Library/Developer/CommandLineTools/usr/include/c++/v1/thread:296:5: note:
candidate constructor not viable: requires 0 arguments, but
4 were provided
thread() _NOEXCEPT : __t_(_LIBCPP_NULL_THREAD) {}
^
1 error generated.
在第一种情况下,它告诉我对于线程 t,没有可以使用多个参数的构造函数,而如果我只是删除参数 (p1, p2, p3) 它也不起作用,因为我我没有通过任何参数....
编译器信息:
Configured with: --prefix=/Library/Developer/CommandLineTools/usr
--with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 10.0.0 (clang-1000.10.44.2)
Target: x86_64-apple-darwin17.7.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
使用的内置命令:g++ doesntwork.cpp -o doesntwork.out
在使用线程编译时,您需要做些什么不同的事情吗?我是否遗漏了一些非常明显的东西?
【问题讨论】:
-
#import - 这不是 c++,请编辑您的问题以包含 minimal reproducible example
-
是的,抱歉的意思是#include
-
使用
-std=c++11编译开关 -
添加 -std=c++11 有效!谢谢@M.M,我不知道这可能会出错......
-
好的,我投票决定重新开放,一旦开放,就会有人将其发布为答案
标签: c++ multithreading macos compiler-errors g++