help in menu-driven "introduction to C++ class"

[ambt]

Hi there,

this is my first class in c++ and I hope I can pass it.

i'm stuck in ( menu driven, Loop, and if )

my prgoram is:

a store program, when the user run the program,

the program should display 4 menu choices.

1- sales
2- open salary file
3- delete salary file
4- end program

and then, if user choose 1: it should display another menu

1- football sales
2- t-shirt sales
3- shoes sales


if the user choice anyone of the 3 sales, it should ask the user three questions and must be answered by user (cin) :

1- how many you bought? (user answer)
2- what is the price? (user answer)
3- do you want to enter more sales? (y or n) : (user answer)



I did all of the previous, but someone told me that my code is too long and I can make it more shorter than what I did.


the problems: 1- I want to save the ( input sales ) to a sales.txt file, and the file must be acoording to what the user did, for example, if I run the program and choose 1 which is "sales" and then choose 2 which is "t-shirt sales" and then I enter 8 for 1st question and 5 for second question, the sales.txt file must save that:


t-shirt (the name of the item that he choose to enter, in our example is t-shirt ).
8*4=40 (in this line must save the calculation of the two questions )


how can I did that?


last question: if the user answer this question ( 3- do you want to enter more sales? (y or n) : ) by yes, the program must display this menu again

1- football sales
2- t-shirt sales
3- shoes sales

and let the user choose any and enter new information and that information save under the old one.


if the user choose NO, the main menu should display which is:

1- sales
2- open salary file
3- delete salary file
4- end program

and let the user choose any thing he wants.



that all of my questions, I hope you guys can help me


here is my code ( I used different names in this code so don't confuse)

if there is anything not good, please correct me to do it in best way.


Best regards,

#include<iostream>
#include<iomanip>
#include<ctime>
#include<fstream>

using namespace std;

int main() 
 {
 	
 	int choice;					// To hold a menu choice
 	int choice_dep;        		// To hold a department choice
 	float itemPrice;			// To hold the price of the item 
 	int quantity;				// To hold the quantity of of the item
 	const float TAX = 1.0975;	// Putnam County Tax rate
 	float total; 			// To hold the calculation of ( item price * quantity * TAX )
 	ofstream salesFile;			// Sales.txt file
	char answer ;
	
		
	// Constants for menu choices
	const int EnterSales_CHOICE = 1,
			  TallyDailySales_CHOICE = 2,
			  DeleteDailySales_CHOICE = 3,
			  EndProgram_CHOICE = 4;  	
	  	
 	
	// Display the menu and get a choice
	cout << "\tPlease select from the following menu items:\n\n"
 		 << "\t1.  ENTER SALES\n" 
 	     << "\t2.  TALLY DAILY SALES\n"
 		 << "\t3.  DELETE DAILY SALES\n"
 		 << "\t4.  END PROGRAM\n\n"
 		 << "\tChoose 1 - 4: ";
	cin >> choice;
	
	
	// Respond to user's menu selection
	if (choice == EnterSales_CHOICE)
	{
		// Constants for department choices
		const int Candy_CHOICE = 1 ,
				  Costumes_CHOICE = 2,
				  Decoration_CHOICE = 3;
			  
		cout << "\n\n---------------------------ENTER SALES---------------------------\n\n"
			 << "\tChoose the department from the following menu:\n\n"
			 << "\t1.  CANDY\n"
			 << "\t2.  COSTUMES\n"
			 << "\t3.  DECORATIONS\n\n"
			 << "\tChoose 1, 2 or 3: ";
		cin >> choice_dep; 
		
		// Respond to user's department selection 
		if (choice_dep == Candy_CHOICE)
		{
			cout << "\n\tWhat is the price of the item? ";
			cin >> itemPrice;
			cout << "\n";
			
			cout << "\tHow many did they buy ? ";
			cin >> quantity;
			cout << "\n";
			
			total = (itemPrice * quantity) * TAX;
			
			salesFile.open("sales.txt", fstream::app);
			salesFile << "Candy" << endl;
			salesFile << total << endl;
			
			salesFile.close();
			
			cout << "\tDo you want to enter more sales? (y or n):";
			

			
			
		}
		
		else if (choice_dep == Costumes_CHOICE)
		{
			cout << "\n\tWhat is the price of the item? ";
			cin >> itemPrice;
			cout << "\n";
			
			cout << "\tHow many did they buy ? ";
			cin >> quantity;
			cout << "\n";
			
			total = (itemPrice * quantity) * TAX;
			
			salesFile.open("sales.txt", fstream::app);
			salesFile << "Costumes" << endl;
			salesFile << total << endl;
			
			salesFile.close();
			
			cout << "\tDo you want to enter more sales? (y or n):";
			
		
		}
		
		else if (choice_dep == Decoration_CHOICE)
		{
			cout << "\n\tWhat is the price of the item? ";
			cin >> itemPrice;
			cout << "\n";
			
			cout << "\tHow many did they buy ? ";
			cin >> quantity;
			cout << "\n";
			
			total = (itemPrice * quantity) * TAX;
			
			salesFile.open("sales.txt", fstream::app);
			salesFile << "Decoration" << endl;
			salesFile << total << endl;
			
			salesFile.close();
			
			cout << "\tDo you want to enter more sales? (y or n):";
		}
		
	}
	
	
	
		
	
	
	
	
	
 	return 0;
 }

[ambt]

please help.

[ambt]

please