顺序栈的兑现

//栈的顺序表示实现

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

//栈初始大小
#define STACK_INIT_SIZE 100
//栈的增长大小
#define STACKINCREMENT 10
#define OVERFLOW 0
#define ERROR 0
#define FALSE 0
#define TRUE 1

typedef int Status;
typedef int SElemType;
typedef int boolean;
//栈的顺序定义
typedef struct{
	SElemType *bese; //栈底指针,在栈构造之前和析构之后值都为NULL
	SElemType *top; //栈顶指针
	int stacksize; //栈的大小
}Stack;

//初始化栈
Stack InitStack()
{
	Stack S;
	S.bese = (SElemType *)malloc(sizeof(SElemType) * STACK_INIT_SIZE);
	if(!S.bese)
		exit(OVERFLOW);
	S.top = S.bese;
	S.stacksize = STACK_INIT_SIZE;
	return S;
}
//若栈不为空,则返回栈顶元素e
Status GetTop(Stack S)
{
	//判断是否为空栈
	if(S.bese == S.top)
		return ERROR;
	//非空栈的栈顶指针始终是在栈顶元素的下一个位置上
	return *(S.top - 1);
}
//入栈操作,若栈满,则增加存储空间
Stack push(Stack S, SElemType e)
{
	//判断栈是否已经满
	if(S.top - S.bese >= STACK_INIT_SIZE)
	{
		S.bese = (SElemType *)realloc(S.bese, sizeof(SElemType) * (S.stacksize + STACKINCREMENT));
		if(!S.bese)
			exit(OVERFLOW);
		S.top = S.bese + S.stacksize; //计算栈顶指针
		S.stacksize += STACKINCREMENT;
	}
	*S.top++ = e;
	return S;
}

//入栈操作
Stack pop(Stack S)
{
	//空栈
	if(S.bese == S.top)
	{
		printf("此栈是空栈!");
		return S;
	}
	S.top--;
	return S;
}
//销毁栈
Stack DestoryStack(Stack S)
{
	S.bese = NULL;
	return S;
}
//清空栈中数据
Stack ClearStack(Stack S)
{
	S.top = S.bese;
	return S;
}
//判断栈是否是空栈
boolean StackEmpty(Stack S)
{
	if(S.bese == S.top)
		return TRUE;
	return FALSE;
}
//返回栈的长度
int StackLength(Stack S)
{
	return S.top - S.bese;
}
int main()
{
	//初始化栈
	Stack S = InitStack();
	for(int i = 0; i < 10; i++)
	{
		S = push(S, i);
	}
	printf("栈的长度为:%d\n", StackLength(S));
	printf("栈顶元素为:%d\n", GetTop(S));
	S = pop(S);
	printf("出栈后:\n");
	printf("栈的长度为:%d\n", StackLength(S));
	printf("栈顶元素为:%d\n", GetTop(S));
	S = ClearStack(S);
	if(StackEmpty(S))
		printf("此栈是空栈");
	S = DestoryStack(S);
	return 0;
}