Call a function before main

c++ c startup main

Nick · Jun 5, 2012 · Viewed 35k times · Source

Possible Duplicate:
Is main() really start of a C++ program?

Is possible to call my function before program's startup? How can i do this work in C++ or C?

Answer

You can have a global variable or a static class member.

1) static class member

//BeforeMain.h
class BeforeMain
{
    static bool foo;
};

//BeforeMain.cpp
#include "BeforeMain.h"
bool BeforeMain::foo = foo();

2) global variable

bool b = foo();
int main()
{
}