第十二章

上机练习3

<pre name="code" class="java">import java.util.Scanner;
public class A2 {
	//private static final A1 A1 = null;
	//private Scanner input;
	Scanner input=new Scanner(System.in);
	public void showinMenu(){
		System.out.println("\n\t欢迎使用我行我素购物管理系统\n");
		System.out.println("\t\t1.登录系统\n");
		System.out.println("\t\t2.退出\n");
		System.out.println("***********************************");
		System.out.println("请选择,输入数字");
	}
	 public void show1() {  
	        boolean v;  
	        do {  
	            v = false;  
	            Scanner input = new Scanner(System.in);  
	            System.out.println("\t\n我行我素购物管理系统>客户信息管理\n");  
	            System.out.println("************************************");  
	            System.out.println("\t\t1.执行客户信息管理");  
	            System.out.println("************************************");  
	            System.out.println("请选择,输入数字或按0返回上一级菜单:");  
	            int n = input.nextInt();  
	            if (n == 1) {  
	                System.out.println("执行客户管理系统");  
	                v = true;  
	            } else if (n == 2) {  
	                show1();  
	                v = true;  
	            } else if (n == 0) {  
	                showMainMenu();  
	  
	            } else {  
	                System.out.println("输入错误,请重新输入:");  
	                v = true;  
	            }  
	        } while (v);  
	    }  
	public void showMainMenu(){
		boolean a;
		do{
			a=false;
			
			System.out.println("我行我素购物管理系统主菜单");
			System.out.println("******************************");
			System.out.println("1.客户信息管理");
			System.out.println("2.真情回馈");
			System.out.println("*********************************");
			System.out.println("请选择,输入数字或0返回上一级菜单:");
			
			 int no1 = input.nextInt();  
	            if (no1 == 1) {  
	                showinMenu();  
	                a = true;  
	                break;  
	            } else if (no1 == 2) {  
	            	showCustMenu();  
	                a = true;  
	                break;  
	            } else if (no1 == 0) {  
	                showinMenu();  
	                a = true;  
	                break;  
	            } else {  
	                System.out.print("输入错误,请重新输入数字:");  
	                a= true;  
	                break;  
	            }  
	        } while (a);  
	    }  
	public void showCustMenu(){
		boolean j;
		do{
		j=false;	
		
		System.out.println("我行我素购物管理系统>真情回馈");
		System.out.println("**************************************");
		System.out.println("1.幸运大放送");
		System.out.println("2.幸运抽奖");
		System.out.println("3.生日问候");
		System.out.println("**************************************");
		System.out.println("请选择,输入数字或按0返回上一级菜单:");
		int o=input.nextInt();
		if (o == 1) {  
            System.out.println("执行幸运大放送");  
            j = true;  
        } else if (o == 2) {  
            System.out.println("执行幸运抽奖");  
            j = true;  
        } else if (o == 3) {  
            System.out.println("执行生日问候");  
            j = true;  
        } else if (o == 0) {  
            showMainMenu();  

        } else {  
            System.out.println("输入错误,请重新输入数字:");  
            j = true;  
        }  
    } while (j);  
}  
	public static void main(String[] agse){
		boolean a=true;
		A2 g=new A2();
		g.showinMenu();
		do{
			Scanner input=new Scanner(System.in);
			int choice = input.nextInt();
			switch(choice){
			case 1:
				g.showMainMenu();
				break;
			case 2:
				System.out.println("谢谢您的使用");
				a=false;
				break;
			}
		}while(a);
	}

	}