using IO = System.Console;

​

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​

// int x = 5;

// IO.WriteLine( x );

​

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​

// 1.) Context / Stateful

// 2.) Access Control / Encapsulation / Simple Public API

// 3.) Method Scope

//          a.) Anything inside the object. (members / "this")

//          b.) Any parameters passed to the method.

//          c.) Any local variables declared within the method body.

//          d.) Anything public and static.

​

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​

class Person

{

    public const int minVotingAge = 18;

    public string name;

    private int age;

    public int getAge()

    {

        return this.age;

    }

    public void setAge(int age)

    {

        this.age = age;

    }

​

    public int getAgeIncrementedBy(int years)

    {

        return this.age + years;

    }

    public int getYearsUntilCanVote()

    {

        if (this.age >= Person.minVotingAge) { return 0; }

​

        return Person.minVotingAge - this.age;

    }

    public void print()

    {

        string output = name + " is " + age + " years old ";

        if (this.getYearsUntilCanVote() == 0)

        {

            output += "and is able to vote.";

        }

        else

        {

            output += "and will be able to vote in " + this.getYearsUntilCanVote() + " years.";

        }

​

        IO.WriteLine(output);

    }

}

​

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​

Person personOne = new Person();

personOne.name = "John";

personOne.setAge(15);

IO.WriteLine( personOne.name );

IO.WriteLine( personOne.getAge() );

personOne.print();

​

Person personTwo = new Person();

personTwo.name = "Jane";

personTwo.setAge(30);

IO.WriteLine( personTwo.name );

IO.WriteLine( personTwo.getAge() );

personTwo.print();