prog.11.10.c

#include <stdio.h>

struct entry
{
	int value;
	struct entry *next;
};

struct entry *findEntry (struct entry *listPtr, int match)
{
	while ( listPtr != (struct entry *) 0 ) {
		if ( listPtr->value == match ) {
			return (listPtr);
		} else {
			listPtr = listPtr->next;
		}
	}

	return (struct entry *) 0;
}

int main (void)
{
	struct entry *findEntry (struct entry *listPtr, int match);
	struct entry n1, n2, n3;
	struct entry *listPtr, *listStart = &n1;

	int search;

	n1.value = 100;
	n1.next  = &n2;

	n2.value = 200;
	n2.next  = &n3;

	n3.value = 300;
	n3.next  = 0;

	printf ("Enter value to locate: ");
	scanf  ("%i", &search);

	listPtr = findEntry (listStart, search);

	if ( listPtr != (struct entry *) 0 ) {
		printf ("Found %i\n", listPtr->value);
	} else {
		printf ("Not found.\n");
	}

	return 0;
}