Hello, I need help with my C++ program assignment, it\'s based on the book, C++

Question

Hello, I need help with my C++ program assignment, it's based on the book, C++ Programing 7th Edition.

Assignment

The existing program keeps track of billing information in an array of variables derived from a struct. Convert the program so that it uses a class instead. Leave no sign that there was a struct in the program behind.

Your program must contain the following attributes:

Choose the default application settings.  

-----------------------------------------------------------------------------

-----------------------------------------------------------------------------

Below is the code for my Main program entry

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#include "stdafx.h"
#include <iostream>
#include <string>

using namespace std;

struct WaterBillType
{
   string AccountNo;
   int AccountType;
   string BillMonth;
   float BillAmount;
};

WaterBillType WaterBill[4];

void SetBillData(int item, string accNo, int accType, string Mo, float amt)
{
   WaterBill[item].AccountNo = accNo;
   WaterBill[item].AccountType = accType;
   WaterBill[item].BillMonth = Mo;
   WaterBill[item].BillAmount = amt;
}

string CreateDataLine(int item)
{
   string ReturnString;
   char buf[9];

   sprintf_s(buf, "%.2f", WaterBill[item].BillAmount);

   ReturnString =
       "Account No.    " + WaterBill[item].AccountNo + " " +
       "Account Type   " + to_string(WaterBill[item].AccountType) + " (1 = Residential, 2 = Commercial, 3 = Industrial) " +
       "Billing Month " + WaterBill[item].BillMonth + " " +
       "Billing Amount $" + buf + " ";

   return ReturnString;
}

int _tmain(int argc, _TCHAR* argv[])
{
   SetBillData(0, "ZPK189834", 1, "May, 2017", 214.12);
   SetBillData(1, "COM882485", 2, "May, 2017", 798.19);
   SetBillData(2, "AIF157893", 3, "May, 2017", 12429.80);
   SetBillData(3, "AUV456719", 3, "May, 2017", 9781.48);

   cout << "Outstanding Water Bills ";

   for (int i = 0; i < 4; i++)
       cout << CreateDataLine(i) << endl;

   cout << endl;
   system("pause");
   return 0;
}

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Below is my Class (ClassWaterBType.cpp)

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#include "stdafx.h"
#include "ClassWaterBType.h"

ClassWaterBType::ClassWaterBType()
{
}

ClassWaterBType::~ClassWaterBType()
{
}

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Below is my Class header (ClassWaterBType.h)

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#pragma once

class ClassWaterBType
{
public:
   ClassWaterBType();
   ~ClassWaterBType();
};

Convert a Struct to a Class

Convert an existing program that uses a struct for data storage to use a class for data storage. Purpose Learn how to add a class to a program.

Create an array of objects.

Pass data to, and retrieve data from, an object. Instructions Using Microsoft Visual Studio create a C++ program that solves the following problem.
1. Read the problem.

Modify an existing program by changing its use of a struct to a class.

The existing program keeps track of billing information in an array of variables derived from a struct. Convert the program so that it uses a class instead. Leave no sign that there was a struct in the program behind.

Your program must contain the following attributes:

a. Remove all references to the struct and any code that accessed it. b. Create a class that replaces the struct and code that accesses the class to perform the same functions. c. Initialize data in the class code, and retrieve the formatted strings from the class code. d. Other than declaring an array of object, calling members of the class to fill and retrieve data from the object, and displaying the return values, there should be no code in the main module.
2. Create a new Visual C++ Win32 Console application and name it:

Choose the default application settings.  

3. Write the program.

Write code that solves the problem described in item 1.

Pause the program so that the console does not disappear until a key is pressed.
4. Insure that you properly document your code.

Explanation / Answer

Ans

#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;
WaterBillType WaterBill[4];
void SetBillData(int item, string accNo, int accType, string Mo, float amt)
{
WaterBill[item].AccountNo = accNo;
WaterBill[item].AccountType = accType;
WaterBill[item].BillMonth = Mo;
WaterBill[item].BillAmount = amt;
}

string CreateDataLine(int item)
{
string ReturnString;
char buf[9];
sprintf_s(buf, "%.2f", WaterBill[item].BillAmount);
ReturnString =
"Account No. " + WaterBill[item].AccountNo + " " +
"Account Type " + to_string(WaterBill[item].AccountType) + " (1 = Residential, 2 = Commercial, 3 = Industrial) " +
"Billing Month " + WaterBill[item].BillMonth + " " +
"Billing Amount $" + buf + " ";
return ReturnString;
}
int _tmain(int argc, _TCHAR* argv[])
{
SetBillData(0, "ZPK189834", 1, "May, 2017", 214.12);
SetBillData(1, "COM882485", 2, "May, 2017", 798.19);
SetBillData(2, "AIF157893", 3, "May, 2017", 12429.80);
SetBillData(3, "AUV456719", 3, "May, 2017", 9781.48);
cout << "Outstanding Water Bills ";
for (int i = 0; i < 4; i++)
cout << CreateDataLine(i) << endl;
cout << endl;
system("pause");
return 0;
}

#include "stdafx.h"
#include "ClassWaterBType.h"
ClassWaterBType::ClassWaterBType(int item, string accNo, int accType, string Mo, float amt)
{
   WaterBill.AccountNo = 0;
WaterBill.AccountType = NULL;
WaterBill.BillMonth = 0;
WaterBill.BillAmount = NULL;
}
ClassWaterBType::~ClassWaterBType()
{
}
#pragma once
class ClassWaterBType
{
   private :
   string AccountNo;
int AccountType;
string BillMonth;
float BillAmount;
public:
ClassWaterBType();
~ClassWaterBType();
String CreateDataLine(int);
void SetBillData(int,string,int,string);
};

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