need more help! (thx)

[TheDreamless]

(we use gcc)
Okay I have to use a function preorder() for my binary tree. It takes a function as an arguement Visit(). I have to use the function Visit to print out to a file.

1) when i try to call preorder from main() I get an error that visit is undeclared (first use in this function). But visit is a function.. how do i get it to pass the function?

2) how can i make an external variable with my filepointer output in such a way that i can go ahead and fprintf() to it?

Thanks in advance everybody.

[joe_bruin]

part one, i have no idea what you're talking about without seeing the code. but my guess is that you have not declared Visit() before your main function. try putting a function prototype near the top of your file (above main())

two, if i understand correctly what you mean is that you want to fprintf to a variable. you should look at sprintf()

[TheDreamless]

I have a prototype in my header file.. and I havent heard of sprintf() I will look it up.