#include
"stdio.h"
#include "stdlib.h"
#include "io.h"
#include "math.h"
#include "time.h"
#define OK 1
#define ERROR 0
#define TRUE 1
#define FALSE 0
#define MAXSIZE 20 /* 存储空间初始分配量 */
typedef int Status;
typedef int SElemType;
/* SElemType类型根据实际情况而定，这里假设为int */
/* 链栈结构 */
typedef struct StackNode
{
SElemType data;
struct StackNode *
next;
}StackNode,*
LinkStackPtr;
typedef struct
{
LinkStackPtr top;
int count;
}LinkStack;
Status visit(SElemType c)
{
printf("%d ",c);
return OK;
}
/* 构造一个空栈S */
Status InitStack(LinkStack *
S)
{
S->top = (LinkStackPtr)
malloc(
sizeof(StackNode));
if(!S->
top)
return ERROR;
S->top=
NULL;
S->count=
0;
return OK;
}
/* 把S置为空栈 */
Status ClearStack(LinkStack *
S)
{
LinkStackPtr p,q;
p=S->
top;
while(p)
{
q=
p;
p=p->
next;
free(q);
}
S->count=
0;
return OK;
}
/* 若栈S为空栈，则返回TRUE，否则返回FALSE */
Status StackEmpty(LinkStack S)
{
if (S.count==
0)
return TRUE;
else
return FALSE;
}
/* 返回S的元素个数，即栈的长度 */
int StackLength(LinkStack S)
{
return S.count;
}
/* 若栈不空，则用e返回S的栈顶元素，并返回OK；否则返回ERROR */
Status GetTop(LinkStack S,SElemType *
e)
{
if (S.top==
NULL)
return ERROR;
else
*e=S.top->
data;
return OK;
}
/* 插入元素e为新的栈顶元素 */
Status Push(LinkStack *
S,SElemType e)
{
LinkStackPtr s=(LinkStackPtr)
malloc(
sizeof(StackNode));
s->data=
e;
s->next=S->top;
/* 把当前的栈顶元素赋值给新结点的直接后继，见图中① */
S->top=s;
/* 将新的结点s赋值给栈顶指针，见图中② */
S->count++
;
return OK;
}
/* 若栈不空，则删除S的栈顶元素，用e返回其值，并返回OK；否则返回ERROR */
Status Pop(LinkStack *S,SElemType *
e)
{
LinkStackPtr p;
if(StackEmpty(*
S))
return ERROR;
*e=S->top->
data;
p=S->top;
/* 将栈顶结点赋值给p，见图中③ */
S->top=S->top->next;
/* 使得栈顶指针下移一位，指向后一结点，见图中④ */
free(p);
/* 释放结点p */
S->count--
;
return OK;
}
Status StackTraverse(LinkStack S)
{
LinkStackPtr p;
p=
S.top;
while(p)
{
visit(p->
data);
p=p->
next;
}
printf("\n");
return OK;
}
int main()
{
int j;
LinkStack s;
int e;
if(InitStack(&s)==
OK)
for(j=
1;j<=
10;j++
)
Push(&
s,j);
printf("栈中元素依次为：");
StackTraverse(s);
Pop(&s,&
e);
printf("弹出的栈顶元素 e=%d\n",e);
printf("栈空否：%d(1:空 0:否)\n",StackEmpty(s));
GetTop(s,&
e);
printf("栈顶元素 e=%d 栈的长度为%d\n",e,StackLength(s));
ClearStack(&
s);
printf("清空栈后，栈空否：%d(1:空 0:否)\n",StackEmpty(s));
return 0;
}
转载于:https://www.cnblogs.com/0515offer/p/4556809.html
相关资源：数据结构—成绩单生成器
