C#: Declaring class

Class in java declared with a keyword "class"

Syntax

class ClassName{

}

Example

class Person{

 }

How to declare properties of a class?

Each property is represented by a variable.

                                   

class Person

{

    float height, weight;

    String color, country;

}

Since height and weight are real type values, so these are declared as a float. Whereas color and country are of type String. So these are declared as type string.

How to define behaviors to a class?

 Each behavior in C# represented by a method.

  Method is a block of statements, with a name associated with it.

      Syntax:

         returnType methodName(parameters){

         }

      Example

         int sum(int a, int b){

            return (a+b);

         }

      here,

         returnType is int

         parameters are a, b.

Return value must match with the return type of the method.

After adding the behaviors for the class Person, code changed like below      

class Person

{

    float height, weight;

    String color, country;

    public float getHeight()

    {

        return height;

    }

    public void setHeight(float height)

    {

        this.height = height;

    }

    public float getWeight()

    {

        return weight;

    }

    public void setWeight(float weight)

    {

        this.weight = weight;

    }

    public String getColor()

    {

        return color;

    }

    public void setColor(String color)

    {

        this.color = color;

    }

    public String getCountry()

    {

        return country;

    }

    public void setCountry(String country)

    {

        this.country = country;

    }

}

Following is the complete working application.

Person.cs

using System;

class Person
{
    float height, weight;
    String color, country;

    public float getHeight()
    {
        return height;
    }

    public void setHeight(float height)
    {
        this.height = height;
    }

    public float getWeight()
    {
        return weight;
    }

    public void setWeight(float weight)
    {
        this.weight = weight;
    }

    public String getColor()
    {
        return color;
    }

    public void setColor(String color)
    {
        this.color = color;
    }

    public String getCountry()
    {
        return country;
    }

    public void setCountry(String country)
    {
        this.country = country;
    }

}

class Program
{

    static void printPerson(Person person)
    {
        Console.WriteLine("Color : {0}", person.getColor());
        Console.WriteLine("Country : {0}", person.getCountry());
        Console.WriteLine("Weight : {0}", person.getWeight());
        Console.WriteLine("Height : {0}", person.getHeight());
    }

    static void Main(string[] args)
    {
        Person person1 = new Person();
        person1.setColor("White");
        person1.setCountry("India");
        person1.setHeight(5.9f);
        person1.setWeight(67.5f);

        printPerson(person1);
    }

}

Output

Color : White
Country : India
Weight : 67.5
Height : 5.9

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