静态链表2-4

节点

typedef struct StaticLinkedNode 
{
	char data;
	int next;
} *NodePtr;
 
 
typedef struct StaticLinkedList 
{
	NodePtr nodes;
	int *used;
} *ListPtr;

打印链表

void printList(ListPtr paraListPtr) 
{
	int p = 0;    
	while (p != -1) 
    {
		printf("%c", paraListPtr->nodes[p].data);
		p = paraListPtr->nodes[p].next;
	}
	printf("\r\n");
}

插入

void insertElement(ListPtr paraListPtr, char paraChar, int paraPosition) 
{
	int p, q, i;
	p = 0;  
	for (i = 0; i < paraPosition; i ++) 
    {
		p = paraListPtr->nodes[p].next;
		if (p == -1) 
        {
			printf("The position %d is beyond the scope of the list.\r\n", paraPosition);
			return;
		}
	} 
	for (i = 1; i < DEFAULT_SIZE; i ++) 
    {
		if (paraListPtr->used[i] == 0) 
        {
			// This is identical to malloc.
			printf("Space at %d allocated.\r\n", i);
			paraListPtr->used[i] = 1;
			q = i;
			break;
		}
	}
	if (i == DEFAULT_SIZE) 
    {
		printf("No space.\r\n");
		return;
	}
	paraListPtr->nodes[q].data = paraChar;
	printf("linking\r\n");
	paraListPtr->nodes[q].next = paraListPtr->nodes[p].next;
	paraListPtr->nodes[p].next = q;
}

删除

void deleteElement(ListPtr paraListPtr, char paraChar) 
{
	int p, q;
	p = 0;     
	while ((paraListPtr->nodes[p].next != -1) && (paraListPtr->nodes[paraListPtr->nodes[p].next].data != paraChar)) 
    {
		
		p = paraListPtr->nodes[p].next;	
	}
	if (paraListPtr->nodes[p].next == -1) 
    {
		printf("Cannot delete %c\r\n", paraChar);
		return;
	}
	q = paraListPtr->nodes[p].next;
	paraListPtr->nodes[p].next = paraListPtr->nodes[paraListPtr->nodes[p].next].next;
	paraListPtr->used[q] = 0;
}

代码

void appendInsertDeleteTest(){
	// Step 1. Initialize an empty list.
	ListPtr tempList = initLinkedList();
	printList(tempList);
 
	// Step 2. Add some characters.
	insertElement(tempList, 'H', 0);
	insertElement(tempList, 'e', 1);
	insertElement(tempList, 'l', 2);
	insertElement(tempList, 'l', 3);
	insertElement(tempList, 'o', 4);
	printList(tempList);
 
	// Step 3. Delete some characters (the first occurrence).
	printf("Deleting 'e'.\r\n");
	deleteElement(tempList, 'e');
	printf("Deleting 'a'.\r\n");
	deleteElement(tempList, 'a');
	printf("Deleting 'o'.\r\n");
	deleteElement(tempList, 'o');
	printList(tempList);
 
	insertElement(tempList, 'x', 1);
	printList(tempList);
}