Answer Posted / vignesh1988i

actually main function is a user defined function for the C
compiler developer.... but it is a built in or predefined
function according to the users using that compiler.... why
it is called as a predefined function because , the
prototype has already been defined in the compiler itself
we the users can't change the meaning of that unless or
until we write our own compiler , we can change the meaning
of main()......

for the main() , we don't know what is the prototype or
where the function has been called and wht excatly the
return value of it... it is built in and abstracted from the
user which is called abstraction in c++.........


thank u

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