Question

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Nested function in C

In C, if i wrote a program in this structure:

main ()
{
  int function1(...)
  {
    ....
  }
}

function 2()
{
   function1(...)
}

It is possible to call function1 from function2 that was written inside the main function?
and also:
In C all the functions are global? or there is some restriction in some situation that from one function you cant call another one?

Answer 1

You cannot nest function definitions in C.

int main(void)
{
  int function1(void)
  {
      /* ... */
  }
}

The definition of function1 above is not valid.