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1. Create a simple calculator for a Windows application. Name the project as CalculatorApplication and

1. Create a simple calculator for a Windows application. Name the project as CalculatorApplication and

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Calculator Using Generic Delegate and Event Objectives: At the end of the exercise, the students should be able to: ▪ Declare, instantiate, and invoke delegates; • Use generic delegate data types in a program; and ▪ Declare events and use event accessors. Software Requirement: • Visual Studio IDE 2015 or higher Procedures: Instructions: 1. Create a simple calculator for a Windows application. Name the project as CalculatorApplication and the form as FrmCalculator. 2. Follow the design for the FrmCalculator using the screenshot below. Refer to the table for the properties for each control. FrmCalculator Enter First Number: 35 Enter Second Number: 10 Windows Forms Controls TextBox ComboBox TextBox Label Answer: 3.5 Button Calculate X Properties Name: txtBoxinput1 Font Size: 12 Name: cbOperator Font Name: Consolas Font Size: 12 Name: txtBoxinput2 Font Size: 12 Name: IblDisplay Total Name: btnEqual Font Name: Consolas Font Size: 14
Transcribed Image Text:Calculator Using Generic Delegate and Event Objectives: At the end of the exercise, the students should be able to: ▪ Declare, instantiate, and invoke delegates; • Use generic delegate data types in a program; and ▪ Declare events and use event accessors. Software Requirement: • Visual Studio IDE 2015 or higher Procedures: Instructions: 1. Create a simple calculator for a Windows application. Name the project as CalculatorApplication and the form as FrmCalculator. 2. Follow the design for the FrmCalculator using the screenshot below. Refer to the table for the properties for each control. FrmCalculator Enter First Number: 35 Enter Second Number: 10 Windows Forms Controls TextBox ComboBox TextBox Label Answer: 3.5 Button Calculate X Properties Name: txtBoxinput1 Font Size: 12 Name: cbOperator Font Name: Consolas Font Size: 12 Name: txtBoxinput2 Font Size: 12 Name: IblDisplay Total Name: btnEqual Font Name: Consolas Font Size: 14
3. In the ComboBox, add the following arithmetic operators: Arithmetic Operators 4. Create a class named CalculatorClass and declare a generic delegate named Formula above the name of the class. See sample code below. public delegate T Information<T>(T arg1); 5. Inside the class, declare the generic delegate's variable and set its data type to double. See sample code below. public Information<string> info; 6. After declaring the variable for the generic delegate, create two (2) methods that retum the sum and difference based on the following table: Method Name GetSum GetDifference Double Double Data Type 7. Add an event accessor named CalculateEvent with two (2) methods add and remove. Set a message in the console just to confirm if the delegate is added or removed. Example: Console.WriteLine("Added the Delegate"); 8. In the frmCalculator class, declare the variable for the CalculatorClass named cal. After declaring. instantiate it inside the constructor of frmCalculator. 9. Set the two (2) variables where the data types are double with a variable named num1 and num2. 10. Double click the button to create the method for button event automatically. frmCalculator Enter First Number: 35 Enter Second Number: 10 Answer: 3.5 Calculate 11. Get the value of txtBoxinput1 for num1 and txtBoxinput2 for num2. Note: You may encounter an error that says, "Cannot implicitly convert type string to double." If this happen use Convert.ToDouble() to convert the value in the TextBox. Challenge Exercise: 12. In CalculatorClass, add two (2) return type methods named Get Product for multiplication and GetQuotient for division. 13. In the frmCalculator class, write a condition that validates the selected arithmetic operator in the ComboBox. It should call the event and display the answer in a label. Example: cal. Calculate Event += new Formulac<double> (cal. Get Sum); lblDisplay Total. Text = cal.GetSum(num1, num2).ToString(); cal. Calculate Event -= new Formula<double> (cal. Get Sum); 14. Run the program to check the output.
Transcribed Image Text:3. In the ComboBox, add the following arithmetic operators: Arithmetic Operators 4. Create a class named CalculatorClass and declare a generic delegate named Formula above the name of the class. See sample code below. public delegate T Information<T>(T arg1); 5. Inside the class, declare the generic delegate's variable and set its data type to double. See sample code below. public Information<string> info; 6. After declaring the variable for the generic delegate, create two (2) methods that retum the sum and difference based on the following table: Method Name GetSum GetDifference Double Double Data Type 7. Add an event accessor named CalculateEvent with two (2) methods add and remove. Set a message in the console just to confirm if the delegate is added or removed. Example: Console.WriteLine("Added the Delegate"); 8. In the frmCalculator class, declare the variable for the CalculatorClass named cal. After declaring. instantiate it inside the constructor of frmCalculator. 9. Set the two (2) variables where the data types are double with a variable named num1 and num2. 10. Double click the button to create the method for button event automatically. frmCalculator Enter First Number: 35 Enter Second Number: 10 Answer: 3.5 Calculate 11. Get the value of txtBoxinput1 for num1 and txtBoxinput2 for num2. Note: You may encounter an error that says, "Cannot implicitly convert type string to double." If this happen use Convert.ToDouble() to convert the value in the TextBox. Challenge Exercise: 12. In CalculatorClass, add two (2) return type methods named Get Product for multiplication and GetQuotient for division. 13. In the frmCalculator class, write a condition that validates the selected arithmetic operator in the ComboBox. It should call the event and display the answer in a label. Example: cal. Calculate Event += new Formulac<double> (cal. Get Sum); lblDisplay Total. Text = cal.GetSum(num1, num2).ToString(); cal. Calculate Event -= new Formula<double> (cal. Get Sum); 14. Run the program to check the output.
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