控制结构综合案例

 

 

 1 package com.unit2.test;
 2 
 3 import java.util.Scanner;
 4 
 5 public class Test10 {
 6 
 7     public static void main(String[] args) {
 8         // 模拟ATM机
 9         Scanner input=new Scanner(System.in);
10         
11         String cardNum1="1001";
12         String pwd1="123";
13         double balance1=10000;
14         
15         String cardNum2="1002";
16         String pwd2="123";
17         double balance2=20000;
18         
19         String cardNum3="3001";
20         String pwd3="123";
21         double balance3=30000;
22         
23         System.out.println("欢迎来到银行！");
24         double balance=0;
25         int count=0;
26         
27         while(1==1) {
28             System.out.println("请输入卡号：");
29             String cardNum=input.next();
30             
31             System.out.println("请输入密码：");
32             String pwd=input.next();
33             
34             if("1001".equals(cardNum) && "123".equals(pwd)) {
35                 balance=balance1;
36                 System.out.println("登录成功，您的账户余额为:"+balance);
37             }else if("1002".equals(cardNum) && "123".equals(pwd)) {
38                 balance=balance2;
39                 System.out.println("登录成功，您的账户余额为:"+balance);
40             }else if("1003".equals(cardNum) && "123".equals(pwd)) {
41                 balance=balance2;
42                 System.out.println("登录成功，您的账户余额为:"+balance);
43             }else {
44                 count++;
45                 if(count<=3) {
46                     System.out.println("账户或密码错误！您还有"+(4-count)+"机会");
47                     continue;
48                 }else {
49                     System.out.println("您的账号已被锁住！");
50                     break;
51                 }
52                 
53             }
54             
55             while(1==1) {
56                 System.out.println("请输入要办理的业务：1存款，2取款，3退出");
57                 String choice=input.next();
58                 
59                 if("1".equals(choice)) {
60                     System.out.println("请输入您的存款金额：");
61                     double num=input.nextDouble();
62                     
63                     if(num>0) {
64                         balance+=num;
65                         System.out.println("您存入的金额为:"+num+"。剩余金额为："+balance);
66                     }else {
67                         System.out.println("存款金额输入错误！");
68                     }
69                     
70                 }else if("2".equals(choice)) {
71                     System.out.println("请输入您的取款金额：");
72                     double num=input.nextDouble();
73                     
74                     if(num>0 && num<=balance) {
75                         balance-=num;
76                         System.out.println("您取出的金额为:"+num+"。剩余金额为："+balance);
77                     }else {
78                         System.out.println("取款金额输入错误！");
79                     }
80                     
81                 }else if("3".equals(choice)) {
82                     System.out.println("办理结束，请收好卡片！");
83                     break;
84                 }else {
85                     System.out.println("输入有误，请重新输入！");
86                     continue;
87                 }
88             }
89         }
90     }
91 
92 }

 

  1 package com.unit2.test;
  2 
  3 import java.util.Scanner;
  4 
  5 public class Test11 {
  6 
  7     public static void main(String[] args) {
  8         // 购物系统
  9         Scanner input=new Scanner(System.in);
 10         
 11         System.out.println("==============51购物管理系统============");
 12         System.out.println("==================1.登录================");
 13         System.out.println("==================2.退出================");
 14         System.out.println("请选择：");
 15         int choice1=input.nextInt();
 16         
 17         if(choice1==1) {
 18             int count=0;
 19             while(1==1) {
 20                 System.out.println("请输入登录名:");
 21                 String name=input.next();
 22                 System.out.println("请输入密码:");
 23                 int pwd=input.nextInt();
 24                 
 25                 if("aaa".equals(name) && pwd==123) {
 26                     while(1==1) {
 27                         System.out.println("==============主菜单============");
 28                         System.out.println("1.客户信息管理");
 29                         System.out.println("2.购物结算");
 30                         System.out.println("3.真情回馈");
 31                         System.out.println("4.注销");
 32                         System.out.println("请选择：");
 33                         int choice2=input.nextInt();
 34                         
 35                         if(choice2==1) {
 36                             System.out.println("===========客户信息管理========");
 37                             System.out.println("1.添加用户");
 38                             System.out.println("2.年龄统计");
 39                             System.out.println("3.返回主菜单");
 40                             System.out.println("请选择：");
 41                             int choice21=input.nextInt();
 42                             
 43                             if(choice21==1) {
 44                                 String list="";
 45                                 while(1==1) {
 46                                     System.out.println("请输入用户名:");
 47                                     String name1=input.next();
 48                                     System.out.println("请输入年龄:");
 49                                     int age=input.nextInt();
 50                                     list+=name1+"----"+age+"\n";
 51                                     System.out.println("添加成功！继续添加请输入1，输入其他内容停止：");
 52                                     int choice3=input.nextInt();
 53                                     if(choice3==1) {
 54                                         continue;
 55                                     }else {
 56                                         System.out.println(list);
 57                                         break;
 58                                     }
 59                                 }
 60                             }else if(choice21==2) {
 61                                 int upage=0;
 62                                 int downage=0;
 63                                 int i=1;
 64                                 while(i<=3) {
 65                                     System.out.println("请输入用户名:");
 66                                     String name2=input.next();
 67                                     System.out.println("请输入年龄:");
 68                                     int age2=input.nextInt();
 69                                     if(age2>=30) {
 70                                         upage++;
 71                                     }else {
 72                                         downage++;
 73                                     }
 74                                     i++;
 75                                 }
 76                                 System.out.println("30岁以上比例:"+upage/3.0*100+"%");
 77                                 System.out.println("30岁以上比例:"+downage/3.0*100+"%");
 78                             }else{
 79                                 continue;
 80                             }
 81                             
 82                         }else if(choice2==2) {
 83                             System.out.println("===========购物结算========");
 84                             System.out.println("商品列表:101.苹果 5元 102.梨子 6元  103.香蕉 3元");
 85                             double total=0;
 86                             while(true) {
 87                                 System.out.println("请输入商品编号:");
 88                                 int pid=input.nextInt();
 89                                 System.out.println("请输入商品数量:");
 90                                 int pnum=input.nextInt();
 91                                 String pName="";
 92                                 double pPrice=0;
 93                                 if(pid==101) {
 94                                     pName="苹果";
 95                                     pPrice=5;
 96                                 }else if(pid==102) {
 97                                     pName="梨子";
 98                                     pPrice=6;
 99                                 }else if(pid==103) {
100                                     pName="香蕉";
101                                     pPrice=3;
102                                 }else {
103                                     System.out.println("没有此商品！");
104                                 }
105                                 
106                                 double t=pnum*pPrice;
107                                 total+=t;
108                                 System.out.println("当前添加的是："+pName+"数量："+pnum+"总价："+t);
109                                 
110                                 System.out.println("结算请输入1，输入其他值则继续添加:");
111                                 int choice=input.nextInt();
112                                 if(choice==1) {
113                                     break;
114                                 }
115                             }
116                             
117                             System.out.println("合计应付款："+total);
118                             System.out.println("请输入付款金额:");
119                             double money=input.nextDouble();
120                             if(money>=total) {
121                                 System.out.println("实付款："+money+"，找零："+(money-total));
122                                 System.out.println("欢迎下次再来！");
123                             }else {
124                                 System.out.println("金额不足！");
125                             }
126                             
127                         }else if(choice2==3) {
128                             System.out.println("==============真情回馈============");
129                             double r=Math.random();
130                             int n=(int)(r*100+1);
131                             System.out.println("幸运数字是："+n);
132                             if(n<=5) {
133                                 System.out.println("恭喜获得一等奖：500元购物券！");
134                             }else if(n<=15) {
135                                 System.out.println("恭喜获得二等奖：10元话费！");
136                             }else {
137                                 System.out.println("谢谢惠顾！");
138                             }
139                             
140                         }else if(choice2==4) {
141                             continue;
142                         }else {
143                             System.out.println("输入错误");
144                             continue;
145                         }
146                     }
147                 }else {
148                     count++;
149                     if(count>3) {
150                         break;
151                     }else {
152                         System.out.println("用户名或密码错误，您还有:"+(4-count)+"次机会");
153                     }
154                 }
155             }
156         }else if(choice1==2) {
157             System.out.println("退出系统！");
158         }else {
159             System.out.println("输入错误！");
160         }
161 
162     }
163 
164 }

 

posted on 2020-06-03 21:48  cherry_ning  阅读(130)  评论(0)    收藏  举报

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