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/********************************************************
* Database -- A very simple database program to *
* look up names in a hardcoded list. *
* *
* Usage: *
* database *
* Program will ask you for a name. *
* Enter the name; it will tell you if *
* it is the list. *
* *
* A blank name terminates the program. *
********************************************************/
#define STRING_LENGTH 80 /* Length of typical string */
#include <stdio.h>
main()
{
char name[STRING_LENGTH]; /* a name to lookup */
int lookup(char *); /* lookup a name */
while (1) {
(void)printf("Enter name: ");
(void)fgets(name, sizeof(name), stdin);
/* Check for blank name */
/* (remember 1 character for newline) */
if (strlen(name) <= 1)
break;
/* Get rid of newline */
name[strlen(name)-1] = '\0';
if (lookup(name))
(void)printf("%s is in the list\n", name);
else
(void)printf("%s is not in the list\n", name);
}
return (0);
}
/********************************************************
* lookup -- lookup a name in a list *
* *
* Parameters *
* name -- name to lookup *
* *
* Returns *
* 1 -- name in the list *
* 0 -- name not in the list *
********************************************************/
int lookup(char *name)
{
/* List of people in the database */
/* Note: Last name is a NULL for end of list */
static char *list[] = {
"John",
"Jim",
"Jane",
"Clyde",
NULL
};
int index; /* index into list */
for (index = 0; list[index] != NULL; index++) {
if (strcmp(list[index], name) == 0)
return (1);
}
return (0);
}
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