Java

Age class and associated methods

Please support our Java advertiser: Programming Forums - DaniWeb Sister Site

Thread Solved

•

Join Date: Mar 2008

Posts: 52

Reputation: clueless101 is an unknown quantity at this point

Solved Threads: 0

clueless101 clueless101 is offline

Offline

Junior Poster in Training

Age class and associated methods

Apr 11th, 2008

I need to design an Ages class with fields to hold 3 ages and includes a constructor, accessor and mutator method. Also needed is a method that returns the average of the ages.

I also need to write a demo class that creates an instance of Ages class. The demo needs to ask the user to enter 3 ages to be stored in the Ages object. Then the demo displays the average of the ages, as reported by the ages object.

I've written the the 1st program, which compiles o.k. But, I'm not sure it is correct.

Can someone take a look at my 1st class to see if I've set it up properly? Also, can someone give me some direction on how to write the demo program?

Thanks in advance.

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
/**
	Ages Program
*/
	public class Ages
	{
	//Instance variables
	private int age1;		//holds 1st age
	private int age2;		//holds 2nd age
	private int age3;		//holds 3rd age
 
	//Constructor Method
	public Ages()
	{
	//Initialize ages to 0
	age1=0;
	age2=0;
	age3=0;
	}
 
	public void setAges (int i, int age)
	{
	//Set i to age
		if (i==1) age1=age;
		else if (i==2) age2=age;
		else age3=age;
	} 
 
	public int getAges(int i)
	{
	//Accessor Method to return ages
		if (i==1) return age1;
		else if (i==2) return age2;
		else return age3;
	}
	public int getAvg()
	{
	//Calcuate and return average of 3 ages
	int ageAvg;
	ageAvg=(int) Math.round((age1+age2+age3)/3.0);
	return ageAvg;
	}
}
/**
	Ages Program
*/
	public class Ages
	{
	//Instance variables
	private int age1;		//holds 1st age
	private int age2;		//holds 2nd age
	private int age3;		//holds 3rd age
	
	//Constructor Method
	public Ages()
	{
	//Initialize ages to 0
	age1=0;
	age2=0;
	age3=0;
	}
	
	public void setAges (int i, int age)
	{
	//Set i to age
		if (i==1) age1=age;
		else if (i==2) age2=age;
		else age3=age;
	} 
		
	public int getAges(int i)
	{
	//Accessor Method to return ages
		if (i==1) return age1;
		else if (i==2) return age2;
		else return age3;
	}
	public int getAvg()
	{
	//Calcuate and return average of 3 ages
	int ageAvg;
	ageAvg=(int) Math.round((age1+age2+age3)/3.0);
	return ageAvg;
	}
}

•

Join Date: Nov 2004

Posts: 6,143

Reputation: jwenting is just really nice

Solved Threads: 212

jwenting

Offline

duckman

Re: Age class and associated methods

Apr 11th, 2008

tell us what you think is wrong, and we may tell you whether you're right.

As people are clearly allowed to attack me but I'm not allowed to defend myself, I no longer post to this site.

•

Join Date: Mar 2008

Posts: 52

Reputation: clueless101 is an unknown quantity at this point

Solved Threads: 0

clueless101 clueless101 is offline

Offline

Junior Poster in Training

Re: Age class and associated methods

Apr 11th, 2008

Actually, I considered the 1st part done.

Am I wrong?

Thanks!

•

Join Date: Mar 2008

Posts: 52

Reputation: clueless101 is an unknown quantity at this point

Solved Threads: 0

clueless101 clueless101 is offline

Offline

Junior Poster in Training

Re: Age class and associated methods

Apr 11th, 2008

Here's what I've completed for demo.

Can anyone tell me why my average displays as "0"????

Thanks in advance.

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
import java.util.Scanner;
 
public class DemoAges
{
	public static void main(String[] args)
	{
		//Declare/initialize Ages
		int age1, age2, age3;
		int avgAge=0;
 
		Scanner scan = new Scanner (System.in);
		//Input Ages
		System.out.println("Enter 1st Age: ");
		age1=scan.nextInt();
		System.out.println("Enter 2nd Age: ");
		age2=scan.nextInt();
		System.out.println("Enter 3rd Age: ");
		age3=scan.nextInt();
 
		//Print average scores
		System.out.println("Average Age: " + avgAge);
		}
}
import java.util.Scanner;

public class DemoAges
{
	public static void main(String[] args)
	{
		//Declare/initialize Ages
		int age1, age2, age3;
		int avgAge=0;
		
		Scanner scan = new Scanner (System.in);
		//Input Ages
		System.out.println("Enter 1st Age: ");
		age1=scan.nextInt();
		System.out.println("Enter 2nd Age: ");
		age2=scan.nextInt();
		System.out.println("Enter 3rd Age: ");
		age3=scan.nextInt();
		
		//Print average scores
		System.out.println("Average Age: " + avgAge);
		}
}

•

Join Date: May 2007

Posts: 4,515

Reputation: Ezzaral has a brilliant future

Solved Threads: 523

Ezzaral

Offline

Industrious Poster

Re: Age class and associated methods

Apr 11th, 2008

The demo class needs to create "Ages" objects and use the methods you have defined. As written your demo just defines some variables and prints the "avgAge" - which is still 0 because you haven't done anything with it.

•

Join Date: Apr 2007

Posts: 126

Reputation: new_2_java is an unknown quantity at this point

Solved Threads: 6

new_2_java new_2_java is offline

Offline

Junior Poster

Re: Age class and associated methods

-1

Apr 11th, 2008

You need this:

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
public class DemoAges
{
	private Ages ages = new Ages();
 
	public static void main(String[] args)
	{
		//Declare/initialize Ages
		int age = 0;
		int type = 0;
		int avgAge=0;
 
		Scanner scan = new Scanner (System.in);
		//Input Ages
		System.out.println("Enter 1st Age: ");
		age=scan.nextInt();
		System.out.println("Enter type: ");
		type=scan.nextInt();
		ages.setAges(type, age);
 
		System.out.println("Enter 2nd Age: ");
		age=scan.nextInt();
		System.out.println("Enter type: ");
		type=scan.nextInt();
		ages.setAges(type, age);
 
		System.out.println("Enter 3rd Age: ");
		age=scan.nextInt();
		System.out.println("Enter type: ");
		type=scan.nextInt();
		ages.setAges(type, age);
 
		//Print average scores
		avgAge = ages.getAvg();
 
		System.out.println("Average Age: " + avgAge);
	}
 
}
public class DemoAges
{
	private Ages ages = new Ages();

	public static void main(String[] args)
	{
		//Declare/initialize Ages
		int age = 0;
		int type = 0;
		int avgAge=0;
		
		Scanner scan = new Scanner (System.in);
		//Input Ages
		System.out.println("Enter 1st Age: ");
		age=scan.nextInt();
		System.out.println("Enter type: ");
		type=scan.nextInt();
		ages.setAges(type, age);
		
		System.out.println("Enter 2nd Age: ");
		age=scan.nextInt();
		System.out.println("Enter type: ");
		type=scan.nextInt();
		ages.setAges(type, age);
		
		System.out.println("Enter 3rd Age: ");
		age=scan.nextInt();
		System.out.println("Enter type: ");
		type=scan.nextInt();
		ages.setAges(type, age);

		//Print average scores
		avgAge = ages.getAvg();

		System.out.println("Average Age: " + avgAge);
	}

}