Reading

Download ChemElemProject and extract the project. Open it in in your IDE, compile and execute it. Now read the code in “ChemElem.cs” and “Program.cs”.

The class definition “ChemElem.cs” contains:

• Three attributes,
• One constructor,
• One static method,
• One methods that returns the melting point in Celsius,
• One ToString method.

The application program “Program.cs” performs one simple conversion from Kelvin to Celsius. It uses data given by the user, create and display a ChemElem object (implicitly calling the ToString method).

Modifying

Do the following:

1. In “ChemElem.cs”, write getters and setters for all attributes
2. In “ChemElem.cs”, write a constructor that requires no arguments.
3. In “Program.cs”, create a second object using the custom constructor that takes 3 arguments, then display the value of its attributes using the getters you previously defined.
4. In “Program.cs”, create an object using the no-args constructor, and set its values using the setters your previously defined.
5. In “Program.cs”, display on the screen the string returned by the ToString method when it is called by the object you created at the previous step.
6. In “Program.cs”, try calling the FromKelvinToCelsius method with one of your object, for instance using hydrogen.FromKelvinToCelsius(34). What happens?
7. Still in “Program.cs”, try calling the MeltingInCelsius method with the class, for instance using ChemElem.MeltingInCelsius();. What happens?

Enhancing

We now want to significantly improve this class, by adding:

1. An attribute for the boiling point,
2. All the tools needed to display the information in Fahrenheit degree, in addition to Celsius and Kelvin.

You may want to comment part, or all of your “Program.cs” file, before starting to change your class.

• Add an attribute for the boiling point (in Kelvin).
• Modify the constructor, so that it takes a 4th argument, and sets its value to be the value of the boiling point attribute.
• Create a static FromKelvinToFahrenheit method, taking inspiration from the FromKelvinToCelsius method.
• Create a MeltingInFahrenheit method, that returns the melting point in Fahrenheit of the calling object. This method should use your FromKelvinToFahrenheit method.
• Create a BoilingInFahrenheit method, that return the boiling point in Fahrenheit of the calling object. This method should use your FromKelvinToFahrenheit method.
• Modify the ToString method, so that the string returned includes
  • The name of the chemical element and its atomic number,
  • The melting point in Kelvin and in Fahrenheit,
  • The boiling point in Kelvin and in Fahrenheit.

You should test all of those modifications in your “Program.cs” file as you implement them. Use relevant data, test your program, and make sure the behaviour is the expected behaviour.