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Copy pathliststack.c
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166 lines (145 loc) · 3.38 KB
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#include "stdio.h"
#include "stdlib.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;
/* SElemType类型根据实际情况而定，这里假设为int */
typedef int SElemType;
/* 链栈结构 */
typedef struct StackNode
{
SElemType data;
struct StackNode *next;
} StackNode,*LinkStackPtr;
typedef struct
{
LinkStackPtr top;
int count;
} LinkStack;
/* 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;
}
Status StackTraverse(LinkStack S)
{
LinkStackPtr p;
p=S.top;
while(p)
{
visit(p->data);
p=p->next;
}
printf("\n");
return OK;
}
Status visit(SElemType c)
{
printf("%d ",c);
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;
}
/* 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;
}
/* 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;
}
int main()
{
LinkStack s;
int opp;
int j, value, e;
if(InitStack(&s)==OK)
{
printf("链栈初始化成功。");
}
printf("\n1.随机给栈赋值 \n2.栈遍历 \n3.进栈 \n4.出栈");
printf("\n5.置空链栈 \n6.判断链栈是否为空");
printf("\n0.退出 \n请选择你的操作：\n");
while(opp != '0')
{
scanf("%d",&opp);
switch(opp)
{
case 1:
srand(time(0));
for(j=1; j<=10; j++)
{
Push(&s,rand()%100+1);
}
StackTraverse(s);
break;
case 2:
StackTraverse(s);
break;
case 3:
printf("请输入需要进栈的元素：");
scanf("%d", &value);
Push(&s, value);
StackTraverse(s);
break;
case 4:
Pop(&s,&e);
printf("弹出的栈顶元素 e=%d\n",e);
StackTraverse(s);
break;
case 5:
ClearStack(&s);
printf("清空栈后，栈是否为空：%d(1:空 0:否)\n",StackEmpty(s));
break;
case 6:
printf("栈是否为空：%d(1:空 0:否)\n",StackEmpty(s));
break;
case 0:
exit(0);
}
}
return 0;
}