Question

我正在尝试学习C ++，但似乎无法使线程正常工作。

#include <iostream>  
#include <thread>  
using namespace std;  

void thing(){  
    cout << "1 is a thing" << endl;  
    int num;
    cin >> num;
}  

int main(){  
    cout << "is 1 a thing?" << endl;  
    thread neat1(thing);  
    return 0;
}

标识符“线程”未定义
我在C ++ 14上

minGW信息：
使用内置规格。 COLLECT_GCC = g ++
COLLECT_LTO_WRAPPER = c：/ mingw / bin /../ libexec / gcc / mingw32 / 8.2.0 / lto-wrapper.exe
目标：mingw32
配置为：../src/gcc-8.2.0/configure --build = x86_64-pc-linux-gnu --host = mingw32 --target = mingw32 --prefix = / mingw --disable-win32-registry- -with-arch = i586 --with-tune =通用--enable-languages = c，c ++，objc，obj- c ++，fortran，ada --with-pkgversion ='MinGW.org GCC-8.2.0-3' --with-gmp = / mingw --with-mpfr = / mingw --with-mpc = / mingw --enable-static --enable-shared --enable-threads --with-dwarf2 --disable-sjlj-例外-启用版本特定的运行时库--with-libiconv-prefix = / mingw --with-libintl- prefix = / mingw --enable-libstdcxx-debug --with-isl = / mingw --enable -libgomp --disable-libvtv --enable-nls --disable-build-format-warnings
线程模型：win32
gcc版本8.2.0（MinGW.org GCC-8.2.0-3）

如果我通过cmd进行编译，就会发生这种情况

>g++ first.cpp -std=c++11  
first.cpp: In function 'int main()':  
first.cpp:13:5: error: 'thread' was not declared in this scope  
     thread neat1(thing);  
     ^~~~~~  
first.cpp:13:5: note: 'std::thread' is defined in header '<thread>'; did you   forget to '#include <thread>'?  
first.cpp:3:1:  
+#include <thread>  
 using namespace std;  
first.cpp:13:5:  
     thread neat1(thing);  
     ^~~~~~

Answer 1

我的编译器原来是问题所在，因此我从在线安装程序的https://sourceforge.net/projects/mingw-w64/files/中删除了旧的编译器，并获得了新的MinGW编译器。设置完成后，线程工作正常。

标识符“线程”未定义

1 个答案: