用链表实现栈----《数据结构与算法分析----C语言描述》

一、头文件：

 

#ifndef _STACK_LINK_H_
#define _STACK_LINK_H_

struct stack_record;
typedef struct stack_record* stack;
typedef int elementType;
struct link_node;
typedef struct link_node node;

int IsEmpty(stack s);
int IsFull(stack s);
stack creatStack(int maxElement);
void disposeStack(stack s);
void makeEmpty(stack s);
void pushElement(elementType x,stack s);
elementType Top(stack s);
void popElement(stack s);
elementType topAndpop(stack s);

#define EMPTY 0
#define MINISIZE (5)

struct stack_record
{
    int capacity;
    int size;
    node *item;	
};

struct link_node
{
    elementType data;
    node *next;
};

#endif

 

二、c文件：

 

#include <stdio.h>
#include <stdlib.h>
#include "stack_link.h"


#define MAXSIZE 100

int IsEmpty(stack s)
{
    return s->size == 0;
}

int IsFull(stack s)
{
    return s->size == s->capacity; 
}

stack creatStack(int maxElement)
{
    stack s;
    s = (stack)malloc(sizeof(struct stack_record));
    if(s == NULL)
    {
	printf("the stack alloca error\n");
	exit(-1);
    }

    s->capacity = MAXSIZE;
    s->item = NULL;
    s->size = 0;
	
    return s;
}


void disposeStack(stack s)
{
    if(s)
    {
	if(s->size)
	    makeEmpty(s);
	
  	free(s);
    }
}

void makeEmpty(stack s)
{
    if(s)
    {
	while(s->size)
	{
	    popElement(s);
	}
    }
}

void pushElement(elementType x,stack s)
{
    if(s)
    {
	if(IsFull(s))
	    return;
	
        node *ptr = (node *)malloc(sizeof(node));
	if(NULL == ptr)
	{
	    printf("the node alloc is error\n");
	    exit(-2);
	}
	
	ptr->data = x;
	ptr->next = s->item;
	s->item = ptr;
	s->size++;
    }
}

elementType Top(stack s)
{
    if(s)
    {
	if(IsEmpty(s))
	{
	    printf("the stack is empty\n");
	    exit(-3);
	}    
	    return s->item->data;
    }
}

void popElement(stack s)
{
    if(IsEmpty(s) )
    {
	printf("the stack is empty\n");
	exit(-4);
    }

    node *ptr = NULL;
    ptr = s->item->next;
    free(s->item);
    s->item = ptr;
    s->size--;
}

elementType topAndpop(stack s)
{
    if(s)
    {
	if(IsEmpty(s))
	{
	    printf("the stack is empty\n");
	    exit(-5);
	}

	elementType x;
	x = Top(s);
	popElement(s);
	return x;
    }
}



int main(int argc,char *argv[])
{
    stack s;
    
    s = creatStack(10);
    int i = 0;
    elementType x;
    while(++i <= 10)
    {
	pushElement(i,s);
	printf("the stack size is %d\n",s->size);
	x = Top(s);
	printf("the stack top is %d\n",x);
    }

    while(s->size)
    {
	x = topAndpop(s);
	printf("the top stack is %d\n",x);
   	sleep(1);
    }

    disposeStack(s);

    return 0;
}

 

三、打印输出：

 

the stack size is 1
the stack top is 1
the stack size is 2
the stack top is 2
the stack size is 3
the stack top is 3
the stack size is 4
the stack top is 4
the stack size is 5
the stack top is 5
the stack size is 6
the stack top is 6
the stack size is 7
the stack top is 7
the stack size is 8
the stack top is 8
the stack size is 9
the stack top is 9
the stack size is 10
the stack top is 10
the top stack is 10
the top stack is 9
the top stack is 8
the top stack is 7
the top stack is 6
the top stack is 5
the top stack is 4
the top stack is 3
the top stack is 2
the top stack is 1