How to call another separate program and passing some variables in C?

Hi,

Forgive me if my question is so simple as I am a newbie to programming..

I have two C programming and I want to call second C file within my first C
program, upon calling, I need to pass some variables (like 1 or 0) to the
second program.

Can anyone tell me how to do? I searched system() but it seems not be able
to do this.

Thanks & Best Regards,
 
Johnny


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