银行管理系统C++代码转Java代码5_11

C++代码源自《C++语言程序设计(第4版)》(清华大学计算机系列教材) 郑莉, 董渊, 何江舟 清华大学出版社

5_11

C++源码

//5_11.cpp
#include "account.cpp"
#include <iostream>
using namespace std;

int main() {
	//建立几个账户
	SavingsAccount sa0(1, 21325302, 0.015);
	SavingsAccount sa1(1, 58320212, 0.015);

	//几笔账目
	sa0.deposit(5, 5000);
	sa1.deposit(25, 10000);
	sa0.deposit(45, 5500);
	sa1.withdraw(60, 4000);

	//开户后第90天到了银行的计息日，结算所有账户的年息
	sa0.settle(90);
	sa1.settle(90);

	//输出各个账户信息
	sa0.show();	cout << endl;
	sa1.show();	cout << endl;
	cout << "Total: " << SavingsAccount::getTotal() << endl;
	return 0;
}

//account.cpp
#include "account.h"
#include <cmath>
#include <iostream>
using namespace std;

double SavingsAccount::total = 0;

//SavingsAccount类相关成员函数的实现
SavingsAccount::SavingsAccount(int date, int id, double rate)
	: id(id), balance(0), rate(rate), lastDate(date), accumulation(0) {
	cout << date << "	#" << id << " is created" << endl;
}

void SavingsAccount::record(int date, double amount) {
	accumulation = accumulate(date);
	lastDate = date;
	amount = floor(amount * 100 + 0.5) / 100;	//保留小数点后两位
	balance += amount;
	total += amount;
	cout << date << "	#" << id << "	" << amount << "	" << balance << endl;
}

void SavingsAccount::deposit(int date, double amount) {
	record(date, amount);
}

void SavingsAccount::withdraw(int date, double amount) {
	if (amount > getBalance())
		cout << "Error: not enough money" << endl;
	else
		record(date, -amount);
}

void SavingsAccount::settle(int date) {
	double interest = accumulate(date) * rate / 365;	//计算年息
	if (interest != 0)
		record(date, interest);
	accumulation = 0;
}

void SavingsAccount::show() const {
	cout << "#" << id << "	Balance: " << balance;
}

//account.h
#ifndef __ACCOUNT_H__
#define __ACCOUNT_H__

class SavingsAccount { //储蓄账户类
private:
	int id;				//账号
	double balance;		//余额
	double rate;		//存款的年利率
	int lastDate;		//上次变更余额的时期
	double accumulation;	//余额按日累加之和
	static double total;	//所有账户的总金额

	//记录一笔帐，date为日期，amount为金额，desc为说明
	void record(int date, double amount);
	//获得到指定日期为止的存款金额按日累积值
	double accumulate(int date) const {
		return accumulation + balance * (date - lastDate);
	}
public:
	//构造函数
	SavingsAccount(int date, int id, double rate);
	int getId() const { return id; }
	double getBalance() const { return balance; }
	double getRate() const { return rate; }
	static double getTotal() { return total; }

	//存入现金
	void deposit(int date, double amount);
	//取出现金
	void withdraw(int date, double amount);
	//结算利息，每年1月1日调用一次该函数
	void settle(int date);
	//显示账户信息
	void show() const;
};

#endif //__ACCOUNT_H__

C++运行结果

Java代码

//Test.java
public class Test {

	public static void main(String[] args) {

	
		SavingsAccount sa0=new SavingsAccount(1, 21325302, 0.015);
		SavingsAccount sa1=new SavingsAccount(1, 58320212, 0.015);

		//几笔账目
		sa0.deposit(5, 5000);
		sa1.deposit(25, 10000);
		sa0.deposit(45, 5500);
		sa1.withdraw(60, 4000);

		//开户后第90天到了银行的计息日，结算所有账户的年息
		sa0.settle(90);
		sa1.settle(90);

		//输出各个账户信息
		sa0.show();	System.out.println();
		sa1.show();	System.out.println();
		System.out.println("Total: " + SavingsAccount.getTotal());

	}

}

//SavingsAccount.java
public class SavingsAccount {
	private int id;				//账号
	private double balance;		//余额
	private double rate;		//存款的年利率
	private int lastDate;		//上次变更余额的时期
	private double accumulation;	//余额按日累加之和
	private static double total;     //所有账户的总金额

	//记录一笔帐，date为日期，amount为金额，desc为说明
	private void record(int date, double amount) {
		accumulation = accumulate(date);
		lastDate = date;
		amount =Math.floor((amount * 100 + 0.5)/100);//保留小数点后两位
		balance += amount;
		total += amount;
		System.out.println(date+"	#"+id+"	"+ amount+"	"+ balance);
	}
	//获得到指定日期为止的存款金额按日累积值
	private final double accumulate(int date)  {
		return accumulation + balance * (date - lastDate);
	}
	//构造函数
	SavingsAccount(int date, int id, double rate) {
	this.id=id;
	this.balance=0;
	this.rate=rate;
	this.lastDate=date;
	this.accumulation=0; 
	System.out.println( date+"	#"+id + " is created" );
}
	int getId() { return id; }
	double getBalance() { return balance; }
	double getRate() { return rate; }
	static double getTotal() { return total; }

	//存入现金
	void deposit(int date, double amount) {
		record(date, amount);
	}
	//取出现金
	void withdraw(int date, double amount) {
		if (amount > getBalance())
			System.out.println( "Error: not enough money
");
		else
			record(date, -amount);
	}
	//结算利息，每年1月1日调用一次该函数
	void settle(int date) {
		double interest = accumulate(date) * rate / 365;	//计算年息
		if (interest != 0)
			record(date, interest);
		accumulation = 0;
	}
	//显示账户信息
	void show() {
		System.out.println("#" + id + "	Balance: " + balance);
	}

}

Java运行结果