C语言数据结构-链式栈

头文件：stack.h

#ifndef __STACK_H__
#define __STACK_H__

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

typedef int DataType;

/* 链式栈节点类型 */
typedef struct staNode
{
DataType data;
struct staNode *pNext;
}StackNode;

/* 链式栈标签类型 */
typedef struct list
{
StackNode *pTop; //指向栈顶指针
int cLen;
}StackList;

extern StackList *createSatckList();
extern int isEmptyStackList(StackList *);
extern int pushStackList(StackList *, DataType );
extern int popStackList(StackList *, DataType *);
extern DataType getStackTop(StackList *);
extern void clearStackList(StackList *);
extern void destroyStackList(StackList **);

extern void showStackList(StackList *pList);
#endif
源文件：stack.c main.c

stack.c

#include "stack.h"

StackList *createSatckList()
{
   StackList *pList = malloc(sizeof(StackList));
   if (NULL == pList)
   {
       perror("fail to malloc");
       return NULL;
   }
   pList->pTop = NULL;
   pList->cLen = 0;

return pList;
}

int isEmptyStackList(StackList *pList)
{
return pList->cLen == 0;
}

入栈：
int pushStackList(StackList *pList, DataType data)
{
   StackNode *pTmpNode = malloc(sizeof(StackNode));
   if (NULL == pTmpNode)
   {
       perror("fail to malloc");
       return -1;
   }
   pTmpNode->data = data;
   pTmpNode->pNext = NULL;

   pTmpNode->pNext = pList->pTop;
   pList->pTop = pTmpNode;
   pList->cLen++;

return 0;
}

遍历：

void showStackList(StackList *pList)
{
   StackNode *pTmpNode = pList->pTop;
   while (pTmpNode != NULL)
   {
       printf("%d ", pTmpNode->data);
       pTmpNode = pTmpNode->pNext;
   }
   printf("\n");
}

出栈：
int popStackList(StackList *pList, DataType *pOutData)
{
   if (isEmptyStackList(pList))
   {
       return 0;
   }
   StackNode *pTmpNode = pList->pTop;
   if (NULL != pOutData)
   {
       *pOutData = pTmpNode->data;
   }
   pList->pTop = pTmpNode->pNext;
   free(pTmpNode);
   pList->cLen--;

return 0;
}

DataType getStackTop(StackList *pList)
{
   if (!isEmptyStackList(pList))
   {
       return pList->pTop->data;
   }
}

void clearStackList(StackList *pList)
{
   while (pList->pTop != NULL)
   {
       popStackList(pList, NULL);
   }
}

销毁：

void destroyStackList(StackList **ppList)
{
   clearStackList(*ppList);
   free(*ppList);
   *ppList = NULL;
}
main.c

#include "stack.h"

int main(int argc, const char *argv[])
{
StackList *pList = NULL;
DataType OutData;

pList = createSatckList();

   pushStackList(pList, 1);
   pushStackList(pList, 2);
   pushStackList(pList, 3);
   pushStackList(pList, 4);

showStackList(pList);

popStackList(pList, &OutData);
printf("pop data = %d\n", OutData);

showStackList(pList);