C语言实现栈(链式栈)

由于栈的插入、删除操作只能在一端进行,而对于线性链表来说,在首端插入或=删除比在尾端要容易一些,所以,将线性链表的首端作为栈顶端,即将头指针作为栈顶指针。

 1、结构体

1 typedef struct node{
2     typename pos;
3     struct node *next;
4 }Node;
5 
6 typedef struct my_stack{
7     Node *top;
8 }Stack;

2、初始化

1 Stack *create_stack(){
2     Stack *s;
3     s = (Stack*)malloc(sizeof(Stack));
4     if(s != NULL) s->top = NULL;
5     else printf("error1\n");
6     return s;
7 }

3、判断栈是否为空

1 int isempty(Stack *s) {
2     return s->top == NULL;
3 }

4、入栈

1 void push_stack(Stack *s, position value) {
2     Node *New;
3     New = (Node *)malloc(sizeof(Node));
4     if(New != NULL) {
5         New->pos = value;
6         New->next = s->top;
7         s->top = New;
8     } else printf("error2\n");
9 }

5、出栈

1 void pop_stack(Stack *s) {
2     Node *p;
3     p = s->top;
4     s->top = s->top->next;
5     free(p);
6 }

6、获取栈顶元素

1 typename get_top(Stack *s) {
2     return s->top->pos;
3 }

 

posted @ 2020-06-17 16:57  湖上的程序员  阅读(368)  评论(0编辑  收藏  举报