2) PE 08 02 (Strings to Number Conversions) Prompt the user to enter three integ

Question

2) PE 08 02 (Strings to Number Conversions) Prompt the user to enter three integers and three floating-point values between -1000 and 1000. Use a single string to read each integer data entry as a string, then convert the string to the proper data type. Display the sum and product of the three integers to the screen. Use a single string to read each floating-point data entry as a string, then convert the string to the proper data type. Display the sum and product of the floating-point numbers to the screen. Use as few variables as possible. (a) We have discussed several vulnerabilities to reading input strings - add a comment in your program that explains how a string can be used as an enhanced security measure to read input. (The comments will be graded)

Explanation / Answer

When this code is compiled and executed, it produces the following result:

Let us look at the various parts of the given program:

The first line of the program using System; - the using keyword is used to include the System namespace in the program. A program generally has multiple using statements.

The next line has the namespace declaration. A namespace is a collection of classes. The HelloWorldApplication namespace contains the class HelloWorld.

The next line has a class declaration, the class HelloWorld contains the data and method definitions that your program uses. Classes generally contain multiple methods. Methods define the behavior of the class. However, the HelloWorld class has only one method Main.

The next line defines the Main method, which is the entry point for all C# programs. The Main method states what the class does when executed.

The next line /*...*/ is ignored by the compiler and it is put to addcomments in the program.

The Main method specifies its behavior with the statement Console.WriteLine("Hello World");

WriteLine is a method of the Console class defined in the Systemnamespace. This statement causes the message "Hello, World!" to be displayed on the screen.

The last line Console.ReadKey(); is for the VS.NET Users. This makes the program wait for a key press and it prevents the screen from running and closing quickly when the program is launched from Visual Studio .NET.

It is worth to note the following points:

C# is case sensitive.

All statements and expression must end with a semicolon (;).

The program execution starts at the Main method.

Unlike Java, program file name could be different from the class name.

Compiling and Executing the Program

If you are using Visual Studio.Net for compiling and executing C# programs, take the following steps:

Start Visual Studio.

On the menu bar, choose File -> New -> Project.

Choose Visual C# from templates, and then choose Windows.

Choose Console Application.

Specify a name for your project and click OK button.

This creates a new project in Solution Explorer.

Write code in the Code Editor.

Click the Run button or press F5 key to execute the project. A Command Prompt window appears that contains the line Hello World.

You can compile a C# program by using the command-line instead of the Visual Studio IDE:

Open a text editor and add the above-mentioned code.

Save the file as helloworld.cs

Open the command prompt tool and go to the directory where you saved the file.

Type csc helloworld.cs and press enter to compile your code.

If there are no errors in your code, the command prompt takes you to the next line and generates helloworld.exe executable file.

Type helloworld to execute your pr

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