C++ 没有名为'的类型；类型'；按值传递变量时出错

对于这样一个错误，我得到的所有解决方案都是通过引用传递变量的函数。如果我按值传递变量，但仍然得到错误，该怎么办。 这是我的密码

这些是MyProcess类中的公共全局变量

int n,gt,rt;
string paths[10];
std::thread t[10];

这是我制作多线程的函数

void MyProcess::start(){
   int j;
   for (int i = 0; i < n; i++){
       j=i+1;
       t[i] =std::thread(processVideo, paths[i], j, gt, rt);
   }
   for (int i = 0; i < n; i++)
       t[i].join();
}

我得到的错误是

C:\Qt\Tools\mingw530_32\i686-w64-mingw32\include\c++\functional:1426: error: static assertion failed: Wrong number of arguments for pointer-to-member
       static_assert(_Varargs::value
       ^
C:\Qt\Tools\mingw530_32\i686-w64-mingw32\include\c++\functional:1505: error: no type named 'type' in 'class std::result_of<std::_Mem_fn<void (MyProcess::*)(std::__cxx11::basic_string<char>, int, int, int)>(std::__cxx11::basic_string<char>, int, int, int)>'
       typedef typename result_of<_Callable(_Args...)>::type result_type;
                                                             ^
C:\Qt\Tools\mingw530_32\i686-w64-mingw32\include\c++\functional:1526: error: no type named 'type' in 'class std::result_of<std::_Mem_fn<void (MyProcess::*)(std::__cxx11::basic_string<char>, int, int, int)>(std::__cxx11::basic_string<char>, int, int, int)>'
         _M_invoke(_Index_tuple<_Indices...>)
         ^

C:\Qt\Tools\mingw530\u 32\i686-w64-mingw32\include\C++\functional:1426:错误：静态断言失败：指向成员的指针的参数数目错误
静态断言（_Varargs:：value）
^
C:\Qt\Tools\mingw530\u 32\i686-w64-mingw32\include\C++\functional:1505:错误：在“类std:：result\u of”中没有名为“type”的类型
typedef typename result_of:：type result_type；
^
C:\Qt\Tools\mingw530\u 32\i686-w64-mingw32\include\C++\functional:1526:错误：在“类std:：result\u of”中没有名为“type”的类型
_M_invoke（_Index_tuple）
^

---

提前感谢。

可能重复的如果线程应该调用非静态成员函数（

processVideo

），它需要该类的实例。可能重复的请给出一个。当我复制和粘贴代码时，我应该得到完全相同或等效的编译器错误，不多不少。

C:\Qt\Tools\mingw530_32\i686-w64-mingw32\include\c++\functional:1426: error: static assertion failed: Wrong number of arguments for pointer-to-member
       static_assert(_Varargs::value
       ^
C:\Qt\Tools\mingw530_32\i686-w64-mingw32\include\c++\functional:1505: error: no type named 'type' in 'class std::result_of<std::_Mem_fn<void (MyProcess::*)(std::__cxx11::basic_string<char>, int, int, int)>(std::__cxx11::basic_string<char>, int, int, int)>'
       typedef typename result_of<_Callable(_Args...)>::type result_type;
                                                             ^
C:\Qt\Tools\mingw530_32\i686-w64-mingw32\include\c++\functional:1526: error: no type named 'type' in 'class std::result_of<std::_Mem_fn<void (MyProcess::*)(std::__cxx11::basic_string<char>, int, int, int)>(std::__cxx11::basic_string<char>, int, int, int)>'
         _M_invoke(_Index_tuple<_Indices...>)
         ^