如何从另一个头文件cpp文件调用main函数

Question

I want to call main function form another header files cpp file. where main included a header file. let's call main.cpp has a header file. can I call main.cpp's main from header files cpp?

This is main.cpp

    #include "another.h"
    int main()
    {
        cout<<"Main";
    }

this is another.h

   class another
    {
       public:
               void another_func(void);
    };

this is another_func.cpp separate file

    void another::another_func(void)
    {
       //how do i call main()
    }

Answer 1

Calling main in your own code is not allowed by the C++ standard. If you do, you are in Undefined Behaviour land and your entire program is meaningless.

Only the implementation may call main as an entry point to your program.

Answer 2

main is special in that it cannot be called (including from inside itself), its address cannot be taken etc.

So you're better off with something like

#include "another.h"
int main()
{
    return Main();
}
int Main() {
    std::cout<<"Main\n";
    return 0;
}

this is another.h

class another
{
   public:
           void another_func(void);
};

this is another_func.cpp separate file

void another::another_func(void)
{
    Main();
}