C/C++ 数据结构顺序栈的基本操作实现

#include <iostream>
#include <Windows.h>
using namespace std;
#define MAXSIZE 6
//顺序栈的实现
typedef struct {
    int* base;
    int* top;
    int stacksize;
    int Length;
}SQstack;
//初始化
void Initstack(SQstack& S) {
    S.base = new int[MAXSIZE];
    S.top = S.base;
    S.stacksize = MAXSIZE;
    S.Length = 0;
}
//入栈
bool InsertStack(SQstack& S,int e) { 
    if (S.top - S.base == S.stacksize) {
        cout << "栈已满，无法入栈！";
        return false;
    }
    //*(S.top++) = e;
    *S.top = e;
    S.top++;
    S.Length++;
    return true;
}
//出栈
bool DeleteStack(SQstack& S, int &e) {
    if (S.base == S.top) {
        cout << "栈为空，无法出栈！" << endl;
        return false;
    }
    S.top--;
    e = *S.top;
    //e = *(--S.top);
    S.Length--;
    return true;
}
//获取栈顶元素
void getTop(SQstack& S,int &e) {
    e = *(S.top-1);//返回栈顶元素的值，栈顶指针不变
    cout <<"栈顶元素为："<< e << " ";
    cout << endl;
}
//判断栈是否为空
bool EmptyStack(SQstack& S) {
    return S.base == S.top;
}
//销毁顺序栈
void Destory(SQstack& S) {
    if (S.base) { 
        delete S.base; 
        S.base = NULL;
    }
}
//获取顺序栈的长度
int getLnegth(SQstack& S) {
    return S.Length;
}
void showMenu() {
    cout << "\t顺序栈的基本操作" << endl;
    cout << "0.退出" << endl;
    cout << "1.入栈" << endl;
    cout << "2.出栈" << endl;
    cout << "3.获取栈顶元素" << endl;
    cout << "4.判断栈是否为空" << endl;
    cout << "5.返回栈的元素个数" << endl;
}
int main() {
    SQstack Q;
    int choose = 0;
    int e = 0;//要入栈的元素
    int n = 0;//入栈的元素个数
    int e1 = 0;//出栈的元素
    int e2 = 0;//栈顶元素
    Initstack(Q);
    showMenu();
    bool flag = -1;
    while (flag) {
        cout << "请选择：";
        cin >> choose;
        switch (choose)
        {
        case 1:
            cout << "请输入要入栈的元素个数：";
            cin >> n;
            while (n > 0) {
                cout << "请输入要入栈的元素：";
                cin >> e;
                if (InsertStack(Q, e)) {
                    cout << "元素入栈成功！" << endl;
                }
                else {
                    cout << "元素入栈失败！" << endl;
                }
                n--;
            }
            break;
        case 2:
            cout << "出栈------" << endl;
            if (DeleteStack(Q, e1)) {
                cout << "出栈的元素 ：" << e1 << endl;
            }
            break;
        case 3:
            getTop(Q, e2);
            break;
        case 4:
            if (EmptyStack(Q)) {
                cout << "顺序栈为空！" << endl;
            }
            else {
                cout << "顺序栈不为空！" << endl;
            }
            break;
        case 5:
            cout << "顺序栈的长度为：" << getLnegth(Q) << endl;
            break;
        case 0:
        default:
            cout << "退出系统！" << endl;
            flag = 0;
        }
    }    
    
    cout << "销毁顺序表----" << endl;
    Destory(Q);
    system("pause");
    return 0;
}