function in C

I understand the usage of function of C today.

I did not know that why main() is start first

and why other method() has to initialized before the main function.

after this I can see the reason.

what is the process of computer is reading when programmer wrote the code.

• what compiler will read frist.
• what will be wrong if programmer did not initialized the non main function.

function is important thing in the programming of C