ATM管理系统

一、题目要求

编写一个ATM管理系统，语言不限，要求应包括以下主要功能：

（1）开户，销户

（2）查询账户余额

（3）存款

（4）取款

（5）转账（一个账户转到另一个账户）等

二.代码提交

开户

public static void account()

{

System.out.print("请输入用户名:");

Scanner name1=new Scanner(System.in);

name=name1.nextLine();

System.out.print("请输入密码:");

Scanner passworld1=new Scanner(System.in);

passworld=passworld1.nextLine();

user.put(name,passworld);

message.put(name,0f);

System.out.println("开户成功");

}

销户

public static void selling()

{

System.out.print("请输入用户名:");

Scanner name1=new Scanner(System.in);

name=name1.nextLine();

System.out.print("请输入密码:");

Scanner passworld1=new Scanner(System.in);

passworld=passworld1.nextLine();

if(user.containsKey(name))

{

String mypassworld=user.get(name);

if(mypassworld.equals(passworld))

{

user.remove(name);

message.remove(name);

System.out.println("销户成功");

}

else

System.out.println("用户密码不正确");

}

else

System.out.println("不存在该用户");

}

余额查询

public static void inquire() {//余额查询

System.out.print("请输入用户名:");

Scanner name1=new Scanner(System.in);

name=name1.nextLine();

System.out.print("请输入密码:");

Scanner passworld1=new Scanner(System.in);

passworld=passworld1.nextLine();

if(user.containsKey(name))

{

String mypassworld=user.get(name);

if(mypassworld.equals(passworld)) {

amount=message.get(name);

System.out.printf("你的余额为:"+"%.2f",amount);

System.out.println();

}

else

System.out.println("用户密码不正确");

}

else

System.out.println("不存在该用户");

}

存款

public static void deposit() {//存款

System.out.print("请输入用户名:");

Scanner name1=new Scanner(System.in);

name=name1.nextLine();

System.out.print("请输入密码:");

Scanner passworld1=new Scanner(System.in);

passworld=passworld1.nextLine();

if(user.containsKey(name))

{

String mypassworld=user.get(name);

if(mypassworld.equals(passworld)) {

amount=message.get(name);

System.out.print("请输入存入的金额:");

Scanner money1=new Scanner(System.in);

float money=money1.nextFloat();

amount+=money;

message.put(name, amount);//把存取的金额存到哈希表中

System.out.printf("存款成功你的余额为:"+"%.2f",amount);

System.out.println();

}

else

System.out.println("用户密码不正确");

}

else

System.out.println("不存在该用户");

}

取款

public static void withdrawal() {//取款

System.out.print("请输入用户名:");

Scanner name1=new Scanner(System.in);

name=name1.nextLine();

System.out.print("请输入密码:");

Scanner passworld1=new Scanner(System.in);

passworld=passworld1.nextLine();

if(user.containsKey(name))

{

String mypassworld=user.get(name);

if(mypassworld.equals(passworld)) {

amount=message.get(name);

System.out.print("请输入取出的金额:");

Scanner money1=new Scanner(System.in);

float money=money1.nextFloat();

if(amount<money)

System.out.println("取款失败，余额不足");

else {

amount=amount-money;

message.put(name, amount);

System.out.printf("取款成功你的余额为:"+"%.2f",amount);

System.out.println();

}

}

else

System.out.println("用户密码不正确");

}

else

System.out.println("不存在该用户");

}

转账

public static void transfer() {//转账

System.out.print("请输入用户名:");

Scanner name1=new Scanner(System.in);

name=name1.nextLine();

System.out.print("请输入密码:");

Scanner passworld1=new Scanner(System.in);

passworld=passworld1.nextLine();

if(user.containsKey(name))

{

String mypassworld=user.get(name);

if(mypassworld.equals(passworld)) {

amount=message.get(name);

System.out.print("请输入转出的金额:");

Scanner money1=new Scanner(System.in);

float money=money1.nextFloat();

System.out.print("请输入要转入的账户:");

Scanner name2=new Scanner(System.in);

String name3=name2.nextLine();//要转入的账户

if(user.containsKey(name3)) {

if(amount<money) {

System.out.println("转账失败，余额不足");

}

else {

amount=amount-money;

message.put(name, amount);

message.put(name3, money);

System.out.printf("取款成功你的余额为:"+"%.2f",amount);

System.out.println();

}

}

else

System.out.println("要转入的账户不存在");

}

else

System.out.println("用户密码不正确");

}

else

System.out.println("不存在该用户");

}