fopen don't work !!

Hi to all,

I need to use the fopen function but it didn't work ? When i try a fopen it always returns NULL -> why it's ANSI C standart ??????

# include <stdio.h>

FILE *fp;

char string[4000];

int main()

{

if (fp = fopen( string , "w"))

{

// got a filepointer

fprintf (fp,"yipie\n");

}

return 0;

}

thx to all http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif

-> Background : I have to port a program which uses a lot of fprintfs and i can set the first parameter of this function per# define at the begining of the prgram. In the original program this parameter is "stdout". I want that the frintf function writes to "string" and not to stdout. Thats why i try to do a fopen to a string (look at the example above)