Bicycle Code - need a little help or tips to continue my homework

**term204** · March 28th, 2018, 08:47 PM

I create the following class: Rueda, Chasis and Bicicleta

I need some tips and recomendation and examples to work with this program.

I need to create a program where the object Bicycle will be create and then the object Bicycle ask to the user to enter the radio and weight of the Rueda (tire) and then ask to enter the height , lenght and weight of the Chasiss. the bicycle will be create at velocity of 0.
Then thanks to the toString of the Classes Rueda and Chassis the program will show the weight and high of the bicycle.
And finally the program need to use a loop to ask if you want to increase or decrease the velocity and for how much. every time the user enter a value the program will be show the actual velocity...

**Norm** · March 29th, 2018, 05:45 AM

Do you have any specific problems you could ask questions about?

**term204** · March 29th, 2018, 07:09 AM

How im able to configure the program to ask the user to enter the Rueda(tire) radio and weight, and the user can enter those values....

**Norm** · March 29th, 2018, 07:25 AM

ask the user to enter ...

Look at the Scanner class. It has methods for reading user input from a user.

configure the program to

Can you list the steps the program should take to do that?

For testing the program, you could write a special testing class. The main() method in the testing class would take the steps needed to test your code.

**term204** · March 29th, 2018, 08:23 AM

The 3rd code , Class Bicicleta have the main() method included.

its a little difficult to explain.. i will try...
In the Class Bicicleta needs 2 objects of the Class Rueda(tire in english) and 1 object of the Class Chassis in its atributes. And needs a Constructor where assigns the values of all his atributes. The class Bicicleta will have a default constructor where values are assigned to all the attributes of its attributes. What it means, to the attributes of the objects that are attributes of the class.

Let me know if you understand..

**Norm** · March 29th, 2018, 08:36 AM

Ok, pick one part of the assignment to work on.
Try writing the code for that part. When you have problems, post some specific questions about that part.

What it means, to the attributes of the objects that are attributes of the class.

I assume there are variables defined in the class that define its attributes. The values for those variables are passed to the class via the class's constructor.
For example from your code:

       Chasis(float lar, float alt, float pe)
	{
		largo = lar;
		altura = alt;
		peso = pe;
	}

If no arguments are passed to the constructor then a default value is assigned:

       Bicicleta()
	{
		velocidad = 0;
	}

**term204** · March 29th, 2018, 09:13 AM

What it means, to the attributes of the objects that are attributes of the class

I'm ask myself the same question..

I assume there are variables defined in the class that define its attributes. The values for those variables are passed to the class via the class's constructor.

That's i understand, but the instructions are not too clear.

**Norm** · March 29th, 2018, 09:39 AM

the instructions are not too clear.

Ask your instructor for more information to clear up the instructions.

**term204** · March 29th, 2018, 10:14 AM

We already ask but he sent the instruction by email , using exactly the same words that he already said.

I'm going to continue this tonight... i found different examples in the web that maybe can help me....

if you can provide any idea i will apreciate, thanks for your help

**Norm** · March 29th, 2018, 10:43 AM

Sorry, I have nothing more than what I have already said.

**User2009** · March 30th, 2018, 09:48 PM

Originally Posted by term204

The class Bicicleta will have a default constructor where values are assigned to all the attributes of its attributes. What it means, to the attributes of the objects that are attributes of the class.

First, this just means that the class Bicicleta should have a default constructor "Bicicleta()" and its attributes (ruedaDelantera, ruedaTrasera and cuadro) should be set with default values. To do that you also should set the attributes for each Rueda object (radio and peso) with some default values. The same for the Chasis object attributes (largo, altura, and peso).

So an attribute of Bicicleta is ruedaDelantera and ruedaDelantera has an attribute called radio. So all attributes need to be set within the default constructor for Bicicleta.

Second, from the instructions that you posted, the main() function should be moved out of the Bicicleta class. Move it to its own class like "BicycleAssignment" or "BicicletaPrograma". This will be "El programa".

**term204** · March 31st, 2018, 06:33 PM

Thanks for the tips, still working on this program..

--- Update ---

How im able to calculate the total weight of the Bicicleta,

Chasis weight(peso) + ruedaDelatera Weight(peso) + ruedaTracera Weight (peso)

**Norm** · March 31st, 2018, 07:03 PM

Can the class's constructor be used to pass the class its values instead of calling the many set... methods?
Now the values passed to the constructors are all 0s. Pass the real values instead.

**User2009** · April 1st, 2018, 10:54 PM

I didn't get a chance to post earlier before term204's edits but it looks like you are on the right track

Chasis weight(peso) + ruedaDelatera Weight(peso) + ruedaTracera Weight (peso)

This is what I was going to post earlier... before your edits:

To calculate the total weight of the Bicicleta, the Bicicleta class should have a method called something like getTotalWeight(). This will return the total weight value.

The Rueda class should have a method like getRuedaWeight(). The same goes for the Chasis class.

That way from Bicicleta.getTotalWeight() you can call Rueda.getRuedaWeight() for each of the tires and add it to the weight of the Chasis class.

These are just the paths to the methods you would use. In your code you would use the actual instance variable. So something like: ruedaDelatera.getRuedaWeight()

The toString() method would be implemented in the same way. That way all you do from the BicicletaPrograma class is call miBicicleta.toString().

There should be no need to have class variables for the ruedas and chasis in the BicicletaPrograma. That would be stored in the Bicicleta class.

Anyways some of this may not apply anymore. Hope that helps.

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