编辑代码

#include<malloc.h>
#include<stdio.h>
int main()
{
#define OK 1
#define ERROR 0
#define STACK_INIT_SIZE 100 // 存储空间初始分配量
#define STACKINCREMENT 10 // 存储空间分配增量
 
typedef int SElemType; // 定义栈元素类型
typedef int Status; // Status是函数的类型,其值是函数结果状态代码,如OK等
 
struct SqStack
{
     SElemType *base; // 在栈构造之前和销毁之后,base的值为NULL
     SElemType *top; // 栈顶指针
     int stacksize; // 当前已分配的存储空间,以元素为单位
}; // 顺序栈
 
Status InitStack(SqStack (&S))
{
    S.base=(SElemType*)malloc(STACK_INIT_SIZE*sizeof(SElemType));
    S.top=S.base;
    S.stacksize=STACK_INIT_SIZE;
    return OK;
// 构造一个空栈S,该栈预定义大小为STACK_INIT_SIZE
}
 
Status Push(SqStack &S,SElemType e)
{
    if(S.top-S.base>=S.stacksize)
    {
        S.base=(SElemType*)realloc(S.base,(S.stacksize+STACKINCREMENT)*sizeof(SElemType));
        if(!S.base)return ERROR;
        S.stacksize+=STACKINCREMENT;
    }
    *S.top++=e;
    return OK;
// 在栈S中插入元素e为新的栈顶元素
}
 
Status Pop(SqStack &S,SElemType &e)
{
    if(S.base==S.top)return ERROR;
    e=*--S.top;
    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 GetTop(SqStack S,SElemType &e)
{
    if(S.base==S.top)return ERROR;
    e=*(S.top-1);
    return OK;
// 若栈不空,则用e返回S的栈顶元素,并返回OK;否则返回ERROR
}
 
int StackLength(SqStack S)
{
    int a;
    a=S.top-S.base;
    return a;
// 返回栈S的元素个数
}
 
Status StackTraverse(SqStack S)
{
// 从栈顶到栈底依次输出栈中的每个元素
	SElemType *p = (SElemType *)malloc(sizeof(SElemType));
    SElemType *q = (SElemType *)malloc(sizeof(SElemType));
	p =S.top;
    q = S.base;
	if(p==q)printf("The Stack is Empty!");//判断栈是否为空
	else
	{
		printf("The Stack is: ");
		p--;
		while(p>=S.base)            
		{
			printf("%d ", *p);
			p--;               
		}
	}
	printf("\n");
	return OK;
}
     int a;
     SqStack S;
     SElemType x, e;
     if(InitStack(S))    // 判断顺序表是否创建成功
{
	printf("A Stack Has Created.\n");
}
while(1)
	{
    printf("1:Push \n2:Pop \n3:Get the Top \n4:Return the Length of the Stack\n5:Load the Stack\n0:Exit\nPlease choose:\n");
	scanf("%d",&a);
		switch(a)
		{
			case 1: scanf("%d", &x);
		      if(!(Push(S,x))) printf("Push Error!\n"); // 判断Push是否合法
		      else printf("The Element %d is Successfully Pushed!\n", x);
		      break;
		case 2: if(!(Pop(S,e))) printf("Pop Error!\n"); // 判断Pop是否合法
			  else printf("The Element %d is Successfully Poped!\n", e);
		  	  break;
		case 3: if(!(GetTop(S,e)))printf("Get Top Error!\n"); // 判断Get Top是否合法
			  else printf("The Top Element is %d!\n", e);
		   	  break;
			case 4: printf("The Length of the Stack is %d!\n",StackLength(S)); 
				  break;
			case 5: StackTraverse(S); 
				  break;
			case 0: return 1;
		}
	}
}