标签:状态 account 软件设计 void amount 模式 state balance public
银行账户
用Java代码模拟实现课堂上的“银行账户”的实例,要求编写客户端测试代码模拟用户存款和取款,注意账户对象状态和行为的变化。
类图
源代码
Java
package rjsj.no22; public class GreenState extends AccountState{ public GreenState(double balance,Account acc) { this.balance = balance; this.account = acc; this.stateName = "正常状态"; } }
package rjsj.no22; public class RedState extends AccountState{ public RedState(AccountState state) { this.balance = state.balance; this.account = state.account; this.stateName="透支状态"; } public void withdraw(double amount) { System.out.println(account.getOwner()+"取款"+amount); System.out.println("抱歉,您的账户已处于透支状态,不能取款!"); } }
package rjsj.no22; public class YellowState extends AccountState{ public YellowState(AccountState state) { this.balance = state.balance; this.account = state.account; this.stateName="欠费状态"; } }
package rjsj.no22; public class Account { private AccountState state; private String owner; public AccountState getState() { return state; } public void setState(AccountState state) { this.state = state; } public String getOwner() { return owner; } public void deposit(double amount) { state.deposit(amount); } public void withdraw(double amount) { state.withdraw(amount); } public Account(String owner, double initBalance) { this.owner = owner; this.state = new GreenState(initBalance,this); System.out.println(this.owner + "开户成功!银行卡初始金额:" + initBalance); System.out.println("----------------------------------------------------"); } }
package rjsj.no22; public abstract class AccountState { protected Account account;//账户名 protected double balance;//账户金额 protected String stateName;//当前状态 public void deposit(double amount) { System.out.println(account.getOwner() + "存款" + amount); this.balance = this.balance + amount; stateCheck(); System.out.println("账户余额:" + this.balance); System.out.println("账户状态:" + account.getState().stateName); } public void withdraw(double amount) { System.out.println(account.getOwner() + "取款" + amount); this.balance = this.balance - amount; stateCheck(); System.out.println("账户余额:" + this.balance); System.out.println("账户状态:" + account.getState().stateName); } public void stateCheck(){//状态审查 if( balance >= -1000 && balance < 0 ) { account.setState(new YellowState(this)); }else if( balance < -1000 ) { account.setState(new RedState(this)); }else if ( balance > 0 ){ account.setState(new GreenState(this.balance,this.account)); } } }
package rjsj.no22; public class Client { public static void main(String[] args) { Account account = new Account("张三",100); account.deposit(8888); System.out.println("------------------------------"); account.withdraw(666); System.out.println("------------------------------"); account.deposit(50); System.out.println("------------------------------"); account.withdraw(9000); System.out.println("------------------------------"); account.withdraw(50000); System.out.println("------------------------------"); account.deposit(3000); System.out.println("------------------------------"); account.withdraw(100); } }
C++
#include<iostream> using namespace std; class Account; class AccountState{ public: Account *acc; double balance; string stateName; public: virtual void stateCheck()=0; void deposit(double amount); virtual void withdraw(double amount); }; class Account{ private: AccountState *state; string owner; public: Account(string owner,double init); void setState(AccountState *state) { this->state=state; } AccountState* getState() { return this->state; } string getOwner() { return this->owner; } void deposit(double amount) { state->deposit(amount); } void withdraw(double amount) { state->withdraw(amount); } }; class RedState :public AccountState{ public: RedState(AccountState *state) { this->balance = state->balance; this->acc = state->acc; this->stateName="透支状态"; } void withdraw(double amount){cout<<"账户处于透支状态,不能取款!"<<endl;} void stateCheck(); }; class YellowState :public AccountState{ public: YellowState(AccountState *state) { this->balance = state->balance; this->acc = state->acc; this->stateName="欠费状态"; } void stateCheck(); }; class GreenState:public AccountState{ public: GreenState(double balance,Account *acc) { this->balance = balance; this->acc = acc; this->stateName="正常状态"; } GreenState(AccountState *state) { this->acc=state->acc; this->balance=state->balance; this->stateName="正常状态"; } void stateCheck() { if(balance>=-1000&&balance<0) { acc->setState(new YellowState(this)); }else if(balance<-1000) { acc->setState(new RedState(this)); } else{ acc->setState(new GreenState(this)); } } }; void RedState::stateCheck(){ if(balance>=-1000&&balance<0) { acc->setState(new YellowState(this)); }else if(balance<-1000) { acc->setState(new RedState(this)); } else { acc->setState(new GreenState(this)); } } void YellowState::stateCheck() { if(balance>=-1000&&balance<0) { acc->setState(new YellowState(this)); }else if(balance<-1000) { acc->setState(new RedState(this)); } else{ acc->setState(new GreenState(this)); } } void AccountState::deposit(double amount){ cout<<acc->getOwner()<<"存款"<<amount<<endl; this->balance+=amount; stateCheck(); cout<<"账户余额:"<<this->balance<<endl; cout<<"账户状态:"<<acc->getState()->stateName<<endl; } void AccountState::withdraw(double amount){ cout<<acc->getOwner()<<"取款"<<amount<<endl; this->balance-=amount; stateCheck(); cout<<"账户余额:"<<this->balance<<endl; cout<<"账户状态:"<<acc->getState()->stateName<<endl; } Account::Account(string owner,double init){ this->owner=owner; this->state=new GreenState(init,this); cout<<"恭喜"<<this->owner<<"开户成功!银行卡初始金额:"<<init<<endl; cout<<"--------------------------------------------------"<<endl; } int main(){ Account *account=new Account("张三",100); account->deposit(100); cout<<"--------------------------------------------------"<<endl; account->withdraw(1000); cout<<"--------------------------------------------------"<<endl; account->deposit(1000); cout<<"--------------------------------------------------"<<endl; account->withdraw(2000); cout<<"--------------------------------------------------"<<endl; account->withdraw(10000); cout<<"--------------------------------------------------"<<endl; account->withdraw(1); cout<<"--------------------------------------------------"<<endl; account->deposit(100000); cout<<"--------------------------------------------------"<<endl; return 0; }
运行结果:
标签:状态,account,软件设计,void,amount,模式,state,balance,public 来源: https://www.cnblogs.com/Arisf/p/15685738.html
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。