C++程序设计（PEARSON版）第三版11.7答案

题目描述（商业ATM机）

Project2: ATM machine

Problem Description:

Design and implement a class named Account that contains:

1. An int data field named id for the account.
2. A double data field named balance for the account.
3. A double data field named annualInterestRate that stores the current interest rate.
4. A no-arg constructor that creates a default account with id 0, balance 0, and annualInterestRate 0.
5. The accessor and mutator functions for id, balance, and annualInterestRate.
6. A function named getMonthlyInterestRate() that returns the monthly interest rate.
7. A function named withdraw(amount) that withdraws a specified amount from the account.
8. A function named deposit(amount) that deposits a specified amount to the account.

 

Use the Account class  to simulate an ATM machine. Create ten accounts in an array with id 0, 1, ..., 9, and initial balance $100. The system prompts the user to enter an id. If the id is entered incorrectly, ask the user to enter a correct one. Once an id is accepted, the main menu is displayed, as shown in the sample run. You can enter a choice 1 for viewing the current balance, 2 for withdrawing money, 3 for depositing money, and 4 for exiting the main menu. Once you exit, the system will prompt for an id again. So, once the system starts, it will not stop.

 

Enter an id: 4

 

Main menu

1: check balance

2: withdraw

3: deposit

4: exit

Enter a choice: 1

The balance is 100.0

Main menu

1: check balance

2: withdraw

3: deposit

4: exit

Enter a choice: 2

Enter an amount to withdraw: 3

 

Main menu

1: check balance

2: withdraw

3: deposit

4: exit

Enter a choice: 1

The balance is 97.0

Main menu

1: check balance

2: withdraw

3: deposit

4: exit

Enter a choice: 3

Enter an amount to deposit: 10

 

Main menu

1: check balance

2: withdraw3: deposit4: exitEnter a choice: 1

The balance is 107.0

Main menu

1: check balance

2: withdraw

3: deposit

4: exit

Enter a choice: 4

 

Enter an id:

下面的代码在VS2017上获得通过

类头文件代码：

#pragma once
class Account
{
public:
	Account();
	~Account();
	int getID();
	double getBanlance();
	double getannualInterestRate();
	void Resetid(int ID);
	void Resetbanlance(double BANLANCE);
	void RestannualInterestRate(double ANNUALINTERESTRATE);
	double getMonthlyInterestRate();
	void withdraw(double amount);
	void deposit(double amount);
private:
	int id;
	double banlance;
	double annualInterestRate;
};

类函数代码：

#include "pch.h"
#include "Account.h"
Account::Account()
{
	id = 0;
	annualInterestRate = 0;
	banlance = 0;
}
int Account::getID()
{
	return id;
}
double Account::getBanlance()
{
	return banlance;
}
double Account::getannualInterestRate()
{
	return annualInterestRate;
}
void Account::Resetid(int ID)
{
	id = ID;
}
void Account::Resetbanlance(double BANLANCE)
{
	banlance = BANLANCE;
}
void Account::RestannualInterestRate(double ANNUALINTERESTRATE)
{
	annualInterestRate = ANNUALINTERESTRATE;
}

double Account::getMonthlyInterestRate()
{
	double monthlyIntetestRate = annualInterestRate / 1200;
	return monthlyIntetestRate;
}
void Account::withdraw(double amount)
{
	banlance -= amount;
}
void Account::deposit(double amount)
{
	banlance += amount;
}
Account::~Account()
{
}

主函数代码：

#include "pch.h"
#include 
#include
#include "Account.h"
using namespace std;
int main()
{
	int I,n,s;
	Account act[10];
	for (int i = 0; i < 10; i++)
	{
		act[i].Resetbanlance(100.0);
	}
	while (true)
	{
		s = 0;
		cout << "Enter an id:";
		cin >> I;
		if (I >= 0 && I <= 9)
		{
			while (true)
			{
				cout << "Main menu" << endl;
				cout << "1:Check Banlance" << endl;
				cout << "2:withdraw" << endl;
				cout << "3:deposit" << endl;
				cout << "4:exit" << endl;
				cout << "Enter a choice：" ;

				cin >> n;
				if (n == 1)
					cout << "The banlance is " <> s;
					act[I].withdraw(s);
				}
				 else if (n == 3)
				{
					cout << "Enter an amount to deposit:";
					cin >> s;
					act[I].deposit(s);
				}
				else if (n == 4)
					break;
				else
				{
					cout << "Wrong number!,try again!" << endl;
				}

			}
		}
		else
		{
			cout << "Wrong ID,please try again!" << endl;
		//	continue;
		}
	}
}