Files wont compile based on prototype for function I was given involving a file pointer [closed]

Question

I receive the message: "error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘attribute’ before ‘*’ token FILE *openFileForReading (char *filename);

I received the error while running a makefile for 3 files however the error was in my header file.

#include <stdio.h
#include <string.h>

#define NUMBER_REVIEWERS 10 
#define NUMBER_MOVIES 3
#define MAX_STR 50 
#define MAX_WORDS 10

struct reviewStruct {                
    char reviewer [MAX_STR];        
    int feedback [NUMBER_MOVIES];
}

FILE *openFileForReading (char *filename); 

I am unsure how to solve this issue. Thank you.