Answer Posted / manoranjan kuiri

Main() is the function from which a c program starts its
execution.And every function returns some value after its
execution.
So it important in most of the C program.If we dont need any
return type we declare a function starting with void.
Means void is a return type.void means not returning any thing.

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The file stdio.h, what does it contain?

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I just typed in this program, and it is acting strangely. Can you see anything wrong with it?

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Explain what is the purpose of "extern" keyword in a function declaration?

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