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package 上机练习;
 
import java.util.Scanner;
 
public class A04class {
    Scanner in = new Scanner(System.in);
 
    public void A() {
        System.out.println("我行我素购物管理系统主菜单");
        System.out.println("******************************");
        System.out.println("\t\n1.客 户 信 息 管 理");
        System.out.println("\t\n2.真 情 回 馈");
        System.out.println("******************************");
        System.out.println("请选择,输入数字或按0返回上一级菜单:");
        int choice = in.nextInt();
        switch (choice) {
        case 1:
            B();
            break;
        case 2:
            C();
            break;
        case 0:
            D();
            break;
        default:
            System.out.println("输入有误!程序异常结束");
            break;
        }
    }
 
    public void B() {
        System.out.println("我行我素购物管理系统客户信息管理");
        System.out.println("******************************");
        System.out.println("\t\n1.显 示 客 户 信 息");
        System.out.println("\t\n2.添 加 客 户 信 息");
        System.out.println("\t\n3.修 改 客 户 信 息");
        System.out.println("\t\n4.查 询 客 户 信 息");
        System.out.println("******************************");
        System.out.println("请选择,输入数字或按0返回上一级菜单:");
        int choice = in.nextInt();
        switch (choice) {
        case 1:
            System.out.println("执 行显 示 客 户 信 息");
            break;
        case 2:
            System.out.println("执 行添 加 客 户 信 息");
            break;
        case 3:
            System.out.println("执 行修 改 客 户 信 息");
            break;
        case 4:
            System.out.println("执 行 查 询 客 户 信 息");
            break;
        case 0:
            A();
            break;
        default:
            System.out.println("输入有误!程序异常结束");
            break;
        }
    }
 
    public void C() {
        System.out.println("我行我素购物管理系统真情回馈");
        System.out.println("******************************");
        System.out.println("\t\n1.生 日 问 候 ");
        System.out.println("\t\n2.幸 运 抽 奖 ");
        System.out.println("\t\n3.幸 运 大 放 送");
        System.out.println("******************************");
        System.out.println("请选择,输入数字或按0返回上一级菜单:");
        int choice = in.nextInt();
        switch (choice) {
        case 1:
            System.out.println("执  行 生 日 问 候");
            break;
        case 2:
            System.out.println("执 行 幸 运 抽 奖");
            break;
        case 3:
            System.out.println("执 行幸 运 大 放 送");
            break;
        case 0:
            B();
            break;
        default:
            System.out.println("输入有误!程序异常结束");
            break;
        }
    }
 
    public void D() {
        System.out.println("我行我素购物管理系统");
        System.out.println("******************************");
        System.out.println("\t\n1.登 录 系 统 ");
        System.out.println("\t\n2.退             出 ");
        System.out.println("******************************");
        System.out.println("请选择,输入数字:");
        int choice = in.nextInt();
        switch (choice) {
        case 1:
            System.out.println("请输入用户名:");
            String admin = in.next();
            System.out.println("请输入密码:");
            String pwd = in.next();
            if (admin.equals("admin") && pwd.equals("admin123")) {
                System.out.println("登录成功!");
                A();
            } else {
                System.out.println("您没有权限进入系统,请重新登录");
                D();
            }
            break;
        case 2:
            System.out.println("安全退出!");
            break;
        default:
            System.out.println("输入有误!程序异常结束");
            break;
        }
    }
}
 
 
 
 
 
package 上机练习;
 
public class A04 {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        A04class A04 = new A04class();
        A04.D();
    }
}