issue with FILE

FILE          *fp[] = {stdout, dump_f};

FILE *fp[2];

void init_fp()
{
    fp[0] = stdout;
    fp[1] = dump_f;
}

// external.c
int hello = 1234;

// external.h
extern int hello;

// main.c
#include "external.h"

int world = hello; // error!

extern FILE *stdout, *stdin, *stderr, *dump_f;