$ make
gcc -Wall -g   -c -o spellback.o spellback.c
spellback.c: In function ‘main’:
spellback.c:36: warning: implicit declaration of function ‘open’
spellback.c:36: warning: assignment makes pointer from integer without a cast
spellback.c:16: warning: unused variable ‘line’
gcc -Wall -g -o simplespell node.o spellback.o

$ ./simplespell -w filer.c
Opening default file
Closed default file
Opening selected file
Bus error

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdbool.h>
#include "node.h"
 
#define MAXSIZE 2048
 
int main(int argc, char *argv[]){
	int ck;
	ck = argc;
	//printf("%d\n", ck);
 
	FILE *fp;
	char line [MAXSIZE];
 
	if(ck == 1){
		printf("Opening default file\n");
		fp = fopen(".WORDS", "r");
		fclose(fp);
		printf("Closed default file\n");
 
	}
 
	if(ck == 2){
		printf("Invalid Input\n");
	}
 
	if(ck == 3){
		printf("Opening default file\n");
		fp = fopen(".WORDS", "r");
		fclose(fp);
		//point fp to next file
		printf("Closed default file\n");
		fp = open(argv[2], "r");
		printf("Opening selected file\n");
		fclose(fp);
		printf("Closed selected file\n");
	}
 
	return 0;
}