T1.显示所有书店客户的信息

 

示例代码

public static void main(String[] args) {
        String[][] users={
                {"1100","18","100"},
                {"1101","24","834"},
                {"1102","13","20000"},
                {"1103","20","2938"},
                {"1104","22","500"},
                {"1105","22","3569"},
                {"1106","45","45"},
                {"1107","6","450"}
        };
        System.out.println("书店管理系统>会员信息管理>显示客户信息");
        System.out.println("会员号\t年龄\t积分");
        for(int i = 0; i < users.length; i++) {
            for (int j = 0; j < users[i].length; j++) {
                System.out.print(users[i][j]+"\t");
            }
            System.out.println();
        }
    }

 T2.新增客户信息

 示例代码

/**
	 * 新增信息
	 */
	
	public static void main(String[] args) {
		String[][] users={
 				{"1100","18","100"},
 				{"1101","24","834"},
 				{"1102","13","20000"},
 				{"1103","20","2938"},
 				{"1104","22","500"},
 				{"1105","22","3569"},
 				{"1106","45","45"},
 				{"1107","6","450"}
 				};
		Scanner input=new Scanner(System.in);
		System.out.println("书店管理系统>会员信息管理>新增客户信息");
		System.out.println("请输入会员名：");
		String name=input.next();
		System.out.println("请输入年龄：");
		String age=input.next();
		System.out.println("请输入积分：");
		String score=input.next();
		int count=users.length+1;
		String[][] newUser=new String[count][3];
		//添加用户信息的关键代码
		for (int i = 0; i < users.length; i++) {
			for (int j = 0; j < users[i].length; j++) {
				newUser[i][j]=users[i][j];
			}
		}
		newUser[count-1][0]=name;
		newUser[count-1][1]=age;
		newUser[count-1][2]=score;
		System.out.println("书店管理系统>会员信息管理>显示客户信息");
		System.out.println("会员号\t年龄\t积分");
		for (int i = 0; i < newUser.length; i++) {
			for (int j = 0; j < newUser[i].length; j++) {
				System.out.print(newUser[i][j]+"\t");
			}
			System.out.println();
		}
	}

T3.成绩排名

 示例代码

/**
	 * 成绩排名
	 */
	
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		String names[]=new String[10];//存储学生姓名
		double scores[]=new double[10];//存储学生成绩
		for (int i = 0; i < 10; i++) {
			System.out.println("请输入第"+(i+1)+"位学生姓名");
			names[i]=sc.next();
			System.out.println("请输入"+names[i]+"的成绩");
			scores[i]=sc.nextDouble();
		}
		
		//排序
		for (int i = 0; i < scores.length-1; i++) {
			for (int j = 0; j < scores.length-1-i; j++) {
				if(scores[j] < scores[j + 1]){    //把小的值交换到后面
						//换分数位置
	                   double temp = scores[j];
	                   scores[j] = scores[j + 1];
	                   scores[j + 1] = temp;
	                   //同时换名字位置
	                   String temp2 = names[j];
	                   names[j] = names[j+1];
	                   names[j+1] = temp2;
	             }
			}
		}
		//输出排名
		for (int i = 0; i < scores.length; i++) {
			System.out.println("第"+(i+1)+"名\t"+names[i]+"\t"+scores[i]);		
		}
	}

T4.ATM取款机多用户登陆

 

示例代码 

	/**
	 * ATM取款机多用户登录
	 */

	public static void main(String[] args) {
		Scanner scanner=new Scanner(System.in);
		String[][] userArray=new String[][]{
			{"百里半","111"},
			{"admin","admin"},
			{"002","123"}
		};
		boolean isLogin=false;//登录状态
		do {
			System.out.println("====================================");
			System.out.println("=         欢迎使用ATM取款机                        =");
			System.out.println("====================================");
			System.out.print("账号:");
			String username=scanner.next();
			System.out.print("密码:");
			String userpwd=scanner.next();
			for (int i = 0; i < userArray.length; i++) {
				if(userArray[i][0].equals(username) && userArray[i][1].equals(userpwd)) {
					isLogin=true;
					break;
				}
			}
			//判断登录状态
			if(isLogin) {
				System.out.println("登录成功");
			}else {
				System.out.println("登录失败");
			}
		} while (isLogin==false);
		
		
	}

T5.打印输出ATM所有用户信息

====================================
=         欢迎使用ATM取款机                        =
====================================
编号    账号    密码    姓名    年龄    性别    余额
1    百里半    111    李小鹏    18    男    1000    
2    002    123    陈晨    20    男    10000    
3    admin    admin    桂池    22    男    100000    
4    004    456    陈红    18    女    5000    
5    005    456    郑瑞    20    男    50000    
6    006    456    张婷    22    女    200000    

 public static void main(String[] args) {
        // TODO Auto-generated method stub
        String[][] userArray=new String[][]{
                {"1","百里半","111","李小鹏","18","男","1000"},
                {"2","002","123","陈晨","20","男","10000"},
                {"3","admin","admin","桂池","22","男","100000"},
                {"4","004","456","陈红","18","女","5000"},
                {"5","005","456","郑瑞","20","男","50000"},
                {"6","006","456","张婷","22","女","200000"}
        };
        System.out.println("====================================");
        System.out.println("=         欢迎使用ATM取款机                        =");
        System.out.println("====================================");
        System.out.println("编号\t账号\t密码\t姓名\t年龄\t性别\t余额");

        for(int i=0;i<userArray.length;i++)
        {
            for(int j=0;j<userArray[i].length;j++)
            {
                System.out.print(userArray[i][j]+"\t");
            }
            System.out.println("");
        }
    }