exit() vrs return() into main()

exit_vrs_return.c

#include <stdio.h>
#include <stdlib.h>

static char *message;

void cleanup(void)
{
	printf("message = \"%s\"\n", message);
}

int main(int argc, char *argv[])
{
	char local_message[] = "hello, world";
	message = local_message;

	atexit(cleanup);

	#ifdef USE_EXIT
		puts("exit(0);");
		exit(0);
	#else
		puts("return 0;");
		return 0;
	#endif
}

Output:

$ gcc -DUSE_EXIT exit_vrs_return.c -o exit_vrs_return && ./exit_vrs_return
exit(0);
message = "hello, world"
$ gcc exit_vrs_return.c -o exit_vrs_return && ./exit_vrs_return
return 0;
message = ""
$

Code from: https://qr.ae/TWR8Ez
Thanks!