Two 'main' functions in C/C++

Question

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

Answer 1

Standard C doesn’t allow nested functions but GCC allows them.

void main()

{

void main()

{

printf(“stackoverflow”);

}

printf(“hii”);

}

The o/p for this code will be -hii

if you use GCC compiler.

There is a simple trick if you want to use 2 main() in your program such that both are successfully executed;you can use define.Example-

void main()

{

printf("In 1st main\n");

func1();

}

#define main func1

void main()

{

printf("In 2nd main\n");

}

Here the o/p will be:

In 1st main

In 2nd main

NOTE:here warning conflicting types of func1 will be generated.

And yes don’t change the place of define.