How do I know if the classes in my program are being used?

[rosales5]

In this program the intention is to create a menu driven program for a pizza restaurant. I have to use a class called Pizza and have to include at least three public functions; one is called SetSize, another one is called Display, and the last one is called ComputePrice. A small pizza is worth $10, a medium is $14, and a large is $17. Each topping is worth 2 dollars. I know that the program runs correctly, but I have doubts over the classes and function actually being utilized correctly or at all.

Program:

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;

class Pizza
{
	private:

			int size;
			int style;
			int quantity;
			int toppings;
			int initialcost;
	public:

			void setsize(int, int, int, int, int);
			void computePrice(int, int, int, int, double, double);
			void outputDescription(int, int, int, int, double, double);

};

void Pizza::setsize(int sz, int stl, int tppngs, int qty, int icost)
{
	size = sz;
	style = stl;
	toppings = tppngs;
	quantity = qty;
	initialcost = icost;
}

void Pizza::computePrice(int sz, int stl, int tppngs, int qty, double icost, double total)
{

	total = (icost + (tppngs*2)) * qty;
	cout<<total<<endl;

};

void Pizza::outputDescription(int s, int stl, int tppngs, int qty, double icost, double total)
{
	cout<<"The total is of: $";
	computePrice(s,stl,tppngs,qty,icost,total);
	cout<<endl;
}

int main()
{

	Pizza pizzapie;


	int sz = 0, stl = 0, tppngs = 0, qty = 0, toppingc = 0, toppingp = 0;
	double total = 0, icost = 0;
	cout<<fixed<<showpoint<<setprecision(2);

		cout<<setw(13)<<"SIZES"<<endl<<endl;		
		cout<<"1: Small Pizza"<<endl;
		cout<<"2: Medium Pizza"<<endl;
		cout<<"3: Large Pizza"<<endl;
		cout<<"4: To Finish Order"<<endl<<endl;
		cout<<"Enter your choice: ";

		cin>>sz;
		cout<<endl;

		switch (sz)
		{
				case 1:
					cout<<setw(13)<<"STYLES"<<endl<<endl;	
					cout<<"1: Handtossed Pizza"<<endl;
					cout<<"2: Deepdish  Pizza"<<endl;
					cout<<"3: Pan Pizza"<<endl<<endl;
					cout<<"Enter the style of pizza you want: ";
					cin>>stl;
					cout<<endl;
					icost = 10;
						switch (stl)
						{
							case 1:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;

									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									
									cout<<endl;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
								break;
							case 2:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;

									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									
									cout<<endl;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
								break;
							case 3:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;
									
									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									
									cout<<endl;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
								break;
						}

				break;

			case 2:
					cout<<setw(13)<<"STYLES"<<endl<<endl;	
					cout<<"1: Handtossed Pizza"<<endl;
					cout<<"2: Deepdish  Pizza"<<endl;
					cout<<"3: Pan Pizza"<<endl<<endl;
					cout<<"Enter the style of pizza you want: ";
					cin>>stl;
					cout<<endl;
					icost = 14;
						switch (stl)
						{
							case 1:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;
									
									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									
									cout<<endl;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
								break;
							case 2:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;
									
									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									
									cout<<endl;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
								break;
							case 3:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;
									
									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									
									cout<<endl;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
								break;
						}
				break;

			case 3:
					cout<<setw(13)<<"STYLES"<<endl<<endl;	
					cout<<"1: Handtossed Pizza"<<endl;
					cout<<"2: Deepdish  Pizza"<<endl;
					cout<<"3: Pan Pizza"<<endl<<endl;
					cout<<"Enter the style of pizza you want: ";
					cin>>stl;
					cout<<endl;
					icost = 17;
						switch (stl)
						{
							case 1:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;

									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									
									cout<<endl;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
								break;
							case 2:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;
									
									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
									
									cout<<endl;
								break;
							case 3:
									cout<<"Enter how many cheese toppings you want: ";
									cin>>toppingc;
									cout<<"Enter how many pepperoni toppings you want: ";
									cin>>toppingp;
									cout<<endl;
									
									tppngs = toppingc + toppingp;
									
									cout<<"How many pizzas of this kind do you want?: ";
									cin>>qty;
									pizzapie.setsize(sz,stl,tppngs,qty,icost);
									cout<<endl;
								break;
						}

			case 4:
				break;
		}
		
		pizzapie.outputDescription(sz,stl,tppngs,qty,icost,total);


	system("pause");
}

[Kubani]

Try to use of source code tag for your code. This way it will be readable easily and you can get answers with a higher probability :-)

[AbstractionAnon]

Line 28: Pizza::computePrice Why are you passing in all these arguments? You already called setsize which stored the value into your Pizzsa object. Why not use the values you've stored? Also, why are you passing total in as an argument. It should be a local variable.

Line 33: Pizza::outputDescription same comments.

Line 39: main() You have lots and lot of repeated code. Any time you have repeated code, that is a good indication the code belongs in a function.

Line 66: Nested switch statements are ugly and very prone to error. Much better to isolate nested switch statements to their own function.

PLEASE USE CODE TAGS (the <> formatting button) when posting code.
It makes it easier to read your code and also easier to respond to your post.
http://www.cplusplus.com/articles/jEywvCM9/
Hint: You can edit your post, highlight your code and press the <> formatting button.

[rosales5]

I used those functions to access the private members of the class. Then I passed the arguments so that they can be transferred to the private members. And the Display function is in case I would need a receipt; I just need to put ofstream to create a text file.

[AbstractionAnon]

I used those functions to access the private members of the class.

No, you're not. setsize() transfers arguments to the private members. That fine. Once you've set the private members, there is no reason to pass them again as arguments to computePrice() and OutputDescription.

computePrice() and outputDescription() are members of your class and should be using the private members of the class, NOT a long list of arguments. Those functions are using the arguments passed, not the private members of the class. If you going to pass all those arguments to those two functions, why did you make them members of your class?

[rosales5]

So is the class not being used at all?

[AbstractionAnon]

You're calling functions that are members of your class, but those functions are NOT using the variables that are part of your class. Defeats the purpose of creating variables in your class.

[gamerguy314]

For things like computePrice(), you should have it return the value of the pizza's price. You have an understanding of "set functions" try looking up get functions.

[rosales5]

Cool thanks man, I'll definitely look into get functions.