#include <stdio.h>
#include <malloc.h>
#define MaxSize 100
typedef char ElemType;
using namespace std;
typedef struct
{
ElemType data[MaxSize];
int top; //栈顶指针
} SqStack;
void InitStack(SqStack *&s) //初始化栈 s
{
s=(SqStack *)malloc(sizeof(SqStack));
s->top=-1;
}
bool DestroyStack(SqStack *s) //销毁栈 s
{
free(s);
}
bool StackEmpty(SqStack *s) //判断栈是否为空
{
return (s->top==-1);
}
bool Push(SqStack *&s,ElemType e) //进栈
{
if(s->top==MaxSize-1) //栈满的情况，即栈上溢出
return false;
s->top++;
s->data[s->top]=e;
return true;
}
bool Pop(SqStack *&s,ElemType &e) //出栈
{
if(s->top==-1) //栈为空的，即栈下溢出
return false;
e=s->data[s->top];
s->top--;
return true;
}
bool GetTop(SqStack *s,ElemType &e)
{
if(s->top==-1)
return false;
e=s->data[s->top];
s->top--;
return true;
}
int main()
{
ElemType e;
SqStack *s;
printf("栈s的基本运算如下:\n");
printf(" (1)初始化栈s\n");
InitStack(s);
printf(" (2)栈为%s\n",(StackEmpty(s)?"空":"非空"));
printf(" (3)依次进栈元素a,b,c,d,e\n");
Push(s,'a');
Push(s,'b');
Push(s,'c');
Push(s,'d');
Push(s,'e');
printf(" (4)栈为%s\n",(StackEmpty(s)?"空":"非空"));
printf(" (5)出栈序列:");
while (!StackEmpty(s))
{
Pop(s,e);
printf("%c ",e);
}
printf("\n");
printf(" (6)栈为%s\n",(StackEmpty(s)?"空":"非空"));
printf(" (7)释放栈\n");
DestroyStack(s);
return 0;
}
