dict2.cpp

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/* dict2.cpp - initw, insertw, deletew, lookupw */

#include <string.h>

#define	MAXWORDLEN	50	/* maximum length of a command or word	*/
#define DICTSIZ 100		/* maximum number of entries in diction.*/
char	dict[DICTSIZ][MAXWORDLEN+1];/* storage for a dictionary of words*/
int	nwords = 0;		/* number of words in the dictionary	*/

/*------------------------------------------------------------------------
 * initw - initialize the dictionary to contain no words at all
 *------------------------------------------------------------------------
 */
int
initw()
{
	nwords = 0;
	return 1;
}

/*------------------------------------------------------------------------
 * insertw - insert  a word in the dictionary
 *------------------------------------------------------------------------
 */
int
insertw(char *word)
{
	strcpy(dict[nwords], word);
	nwords++;
	return nwords;
}

/*------------------------------------------------------------------------
 * deletew - delete  a word from the dictionary
 *------------------------------------------------------------------------
 */
int
deletew(char *word)
{
	int	i;

	for (i=0 ; i<nwords ; i++)
		if (strcmp(word, dict[i]) == 0) {
			nwords--;
			strcpy(dict[i], dict[nwords]);
			return 1;
		}
	return 0;
}

/*------------------------------------------------------------------------
 * lookupw - look up a word in the dictionary
 *------------------------------------------------------------------------
 */
int
lookupw(char *word)
{
	int	i;

	for (i=0 ; i<nwords ; i++)
		if (strcmp(word, dict[i]) == 0)
			return 1;
	return 0;
}