Two 'main' functions in C/C++

Question

Can I write a program in C or in C++ with two main functions?

Answer 1

Yes , Multiple main() are allowed but not in global namespace.

"Every C++ program must have exactly one global function named main()" - Bjarne stroustrup.

Eg 1 :

namespace foo
{
  int main() //Main 1 
  {
    return 1;
  }
}

int main() // Main 2   
{

}

// Main 1 : namespace is foo

// Main 2 : namespace is global

// Allowed : Yes , its allowed as both the main() are present in different namespaces.

Eg 2 :

int main() //Main 1 
{
    return 1;
}

void main() // Main 2   
{

}

// Main 1 : namespace is global

// Main 2 : namespace is global

// Allowed : No , as multiple main() in global namespace . Compile-time error is thrown : redefinition of main() ..