Danilo Pizza

1. Start Microsoft Visual C++ .Net and create a new Windows Forms Application named Danilo Pizza
    
   
2. Design the form as follows:
    

   Control Text Name Additional Properties GroupBox Pizza Size     RadioButton Small rdoSmall   TextBox 8.95 txtSmall   RadioButton Medium rdoMedium Checked: True TextBox 10.75 txtMedium   RadioButton Large rdoLarge   TextBox 12.95 txtLarge   GroupBox Side Orders     Label Qty     Label Unit Price     Label Sub Total     Label Bread Sticks     TextBox 0 txtQtyBread AlignText: Right TextBox 3.25 txtPriceBread AlignText: Right TextBox 0.00 txtTotalBread AlignText: Right Label Buffalo Wings     TextBox 0 txtQtyWings AlignText: Right TextBox 2.15 txtPriceWings AlignText: Right TextBox 0.00 txtTotalWings AlignText: Right GroupBox Toppings     CheckBox Pepperoni chkPepperoni CheckAlign: MiddleRight CheckBox Sausage chkSausage CheckAlign: MiddleRight CheckBox Extra Cheese chkExtraCheese CheckAlign: MiddleRight CheckBox Olives chkOlives CheckAlign: MiddleRight CheckBox Onions chkOnions CheckAlign: MiddleRight Label Each Topping     TextBox 0.45 txtEachTopping AlignText: Right GroupBox Drinks     Label Qty     Label Unit Price     Label Sub Total     Label Soda Can     TextBox 0 txtQtyCan AlignText: Right TextBox 1.45 txtPriceCan AlignText: Right TextBox 0.00 txtTotalCan AlignText: Right Label Soda 20 Oz.     TextBox 0 txtQtySoda20 AlignText: Right TextBox 1.45 txtPriceSoda20 AlignText: Right TextBox 0.00 txtTotalSoda20 AlignText: Right Label Soda 2L Bottle     TextBox 0 txtQtySoda2L AlignText: Right TextBox 1.45 txtPriceSoda2L AlignText: Right TextBox 0.00 txtTotalSoda2L AlignText: Right Label Orange Juice     TextBox 0 txtQtyOJ AlignText: Right TextBox 2.25 txtPriceOJ AlignText: Right TextBox 0.00 txtTotalOJ AlignText: Right Label Water     TextBox 0 txtQtyWater AlignText: Right TextBox 1.25 txtPriceWater AlignText: Right TextBox 0.00 txtTotalWater AlignText: Right Button Close btnClose   Label Total Price     Text Box 0.00 txtTotalPrice AlignRight: Right

3. Save everything

Coding the Application

1. In Class View, expand {} DaniloPizza
2. Right-click Form1 -> Add -> Add Function...
3. Set the Return Type as void
4. Set the name of the function as CalculatePrice
5. Click Finish and implement the function as follows:
    

   void CalculatePrice(void) { double PriceSize, PriceEachTopping, BWings, Bread, SodaCan, Soda20, Soda2L, OJ, Water, PriceToppings, TotalOrder; int Pepperoni, Sausage, ExtraCheese, Onions, Olives; // Get the price of pizza depending on the selected size if( rdoSmall->Checked == true ) PriceSize = txtSmall->Text->ToDouble(0); if( rdoMedium->Checked == true ) PriceSize = txtMedium->Text->ToDouble(0); if( rdoLarge->Checked == true ) PriceSize = txtLarge->Text->ToDouble(0); // Get the price of a topping if it was selected if( chkPepperoni->Checked == true ) Pepperoni = 1; else Pepperoni = 0; if( chkSausage->Checked == true ) Sausage = 1; else Sausage = 0; if( chkExtraCheese->Checked == true ) ExtraCheese = 1; else ExtraCheese = 0; if( chkOnions->Checked == true ) Onions = 1; else Onions = 0; if( chkOlives->Checked == true ) Olives = 1; else Olives = 0; PriceEachTopping = txtEachTopping->Text->ToDouble(0); PriceToppings = (Pepperoni + Sausage + ExtraCheese + Onions + Olives) * PriceEachTopping; // Calculate the price of the side dishes // depending on the quantity entered BWings = txtTotalWings->Text->ToDouble(0); Bread = txtTotalBread->Text->ToDouble(0); // Calculate the price of the drink(s) SodaCan = txtTotalCan->Text->ToDouble(0); Soda20 = txtTotalSoda20->Text->ToDouble(0); Soda2L = txtTotalSoda2L->Text->ToDouble(0); OJ = txtTotalOJ->Text->ToDouble(0); Water = txtTotalWater->Text->ToDouble(0); TotalOrder = PriceSize + PriceToppings + BWings + Bread + SodaCan + Soda20 + Soda2L + OJ + Water; txtTotalPrice->Text = TotalOrder.ToString("C"); }

6. On the form double-click each radio button and each check box
7. In their implementation, simply call the CalculatePrice() function:
    

   private: System::Void rdoSmall_CheckedChanged(System::Object * sender, System::EventArgs * e) { CalculatePrice(); } private: System::Void rdoMedium_CheckedChanged(System::Object * sender, System::EventArgs * e) { CalculatePrice(); } private: System::Void rdoLarge_CheckedChanged(System::Object * sender, System::EventArgs * e) { CalculatePrice(); } private: System::Void chkPepperoni_CheckedChanged(System::Object * sender, System::EventArgs * e) { CalculatePrice(); } private: System::Void chkSausage_CheckedChanged(System::Object * sender, System::EventArgs * e) { CalculatePrice(); } private: System::Void chkExtraCheese_CheckedChanged(System::Object * sender, System::EventArgs * e) { CalculatePrice(); } private: System::Void chkOlives_CheckedChanged(System::Object * sender, System::EventArgs * e) { CalculatePrice(); } private: System::Void chkOnions_CheckedChanged(System::Object * sender, System::EventArgs * e) { CalculatePrice(); }

8. Test the application
9. On the form, click the Qty text box corresponding to the Bread Sticks
10. In the Properties window, click the Events button and, in the list of events, double-click Leave
11. In the same way, initiate the Leave of the Qty text box of the Buffalo Wings and the drinks
12. Implement the events as follows:
     

    private: System::Void txtQtyBread_Leave(System::Object * sender, System::EventArgs * e) { int Qty; double Price, Total; if( txtQtyBread->Text == "" ) Qty = 0; else Qty = txtQtyBread->Text->ToInt32(0); Price = txtPriceBread->Text->ToDouble(0); Total = Qty * Price; txtTotalBread->Text = Total.ToString("F"); CalculatePrice(); } private: System::Void txtQtyWings_Leave(System::Object * sender, System::EventArgs * e) { int Qty; double Price, Total; if( txtQtyWings->Text == "" ) Qty = 0; else Qty = txtQtyWings->Text->ToInt32(0); Price = txtPriceWings->Text->ToDouble(0); Total = Qty * Price; txtTotalWings->Text = Total.ToString("F"); CalculatePrice(); } private: System::Void txtQtyCan_Leave(System::Object * sender, System::EventArgs * e) { int Qty; double Price, Total; if( txtQtyCan->Text == "" ) Qty = 0; else Qty = txtQtyCan->Text->ToInt32(0); Price = txtPriceCan->Text->ToDouble(0); Total = Qty * Price; txtTotalCan->Text = Total.ToString("F"); CalculatePrice(); } private: System::Void txtQtySoda20_Leave(System::Object * sender, System::EventArgs * e) { int Qty; double Price, Total; if( txtQtySoda20->Text == "" ) Qty = 0; else Qty = txtQtySoda20->Text->ToInt32(0); Price = txtPriceSoda20->Text->ToDouble(0); Total = Qty * Price; txtTotalSoda20->Text = Total.ToString("F"); CalculatePrice(); } private: System::Void txtQtySoda2L_Leave(System::Object * sender, System::EventArgs * e) { int Qty; double Price, Total; if( txtQtySoda2L->Text == "" ) Qty = 0; else Qty = txtQtySoda2L->Text->ToInt32(0); Price = txtPriceSoda2L->Text->ToDouble(0); Total = Qty * Price; txtTotalSoda2L->Text = Total.ToString("F"); CalculatePrice(); } private: System::Void txtQtyOJ_Leave(System::Object * sender, System::EventArgs * e) { int Qty; double Price, Total; if( txtQtyOJ->Text == "" ) Qty = 0; else Qty = txtQtyOJ->Text->ToInt32(0); Price = txtPriceOJ->Text->ToDouble(0); Total = Qty * Price; txtTotalOJ->Text = Total.ToString("F"); CalculatePrice(); } private: System::Void txtQtyWater_Leave(System::Object * sender, System::EventArgs * e) { int Qty; double Price, Total; if( txtQtyWater->Text == "" ) Qty = 0; else Qty = txtQtyWater->Text->ToInt32(0); Price = txtPriceWater->Text->ToDouble(0); Total = Qty * Price; txtTotalWater->Text = Total.ToString("F"); CalculatePrice(); }

13. On the form, double-click the Close button and implement its Click event as follows:
     

    private: System::Void button1_Click(System::Object * sender, System::EventArgs * e) { Close(); }

14. Test the application