How do I access a variable in a one C file from another?

I have two C files. I want to declare a variable in one, then be able to access it from another C file. My definition of the example string might not be perfect, but you get the idea.


char *hello="hello";




// file1.h
#ifndef FILE1_H
#define FILE1_H
extern char* hello;


// file1.c
// as before

// file2.c
#include "file1.h"
// the rest as before

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