# Robot help.

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• February 14th, 2010, 12:10 PM
mlan
Robot help.
Hi!
I'm new to this programming stuff and I'm currently struggling.
I was given a project to construct a Robot with a fully charged battery and to make it move with certain buttons.

I was given an incomplete code by my teacher, but I don't really understand what I'm doing.

Code :

public class Robot {

/**
* Constructs a robot with a fully charged battery.
* The initial heading is zero degrees (north).
* @param x initial x coordinate, in meters.
* @param y initial y coordinate, in meters.
*/
public Robot(double x, double y) {

}

/**
* Gets the x-coordinate of this robot.
* @return the x-coordinate, in meters.
*/
public double getX() {
return 0.0; // TODO
}

/**
* Gets the y-coordinate of this robot.
* @return the y-coordinate, in meters.
*/
public double getY() {
return 0.0; // TODO
}

/**
* Gets the heading of this robot. The heading is greater than or
* equal to 0 degrees (north) and less than 360 degrees.
* @return the heading, in degrees.
*/
public double getHeading() {
return 0.0; // TODO
}

/**
* Gets the battery capacity for this robot.
* @return the battery capacity, in watts.
*/
public double getBatteryCapacity() {
if (BCW <1.0)
return 0.5;
else
return 0;
}

/**
* Returns the current battery power for this robot.
* @return current battery power, in watts.
*/
public double readBatteryMeter() {
return 0.0; // TODO
}

/**
* Returns the distance between this robot's initial and current locations.
* Because this robot may have turned, this distance may be less than the
* total number of meters traveled. For example, if the robot has returned
* to it's initial location, this distance is zero.
* @return the distance, in meters.
*/
public double distance() {
return 0.0; // TODO
}

/**
* Turns this robot 90 degrees to the right (clockwise).
* Power required to turn 90 degrees is the same as that required to go
* one meter. If insufficient power is available to complete the turn,
* the robot consumes all remaining power but does not turn at all.
*/
public void turnRight() {
// TODO
}

/**
* Turns this robot 90 degrees to the left (counter-clockwise).
* Power required to turn 90 degrees is the same as that required to go
* one meter. If insufficient power is available to complete the turn,
* the robot consumes all remaining power but does not turn at all.
*/
public void turnLeft() {
// TODO
}

/**
* Recharges the battery for this robot for the specified amount of time.
* Recharging has no effect after the battery's capacity is reached.
* In other words, battery power must never exceed battery capacity.
* @param seconds recharging time, in seconds.
*/
public void recharge(double seconds) {
wattsAvailable += BCW;
}

/**
* Trys to make this robot go forward the specified distance.
* The robot goes only as far as possible with available battery power.
* @param distance the distance to go, in meters.
* @return the distance actually gone.
*/
public double goForward(double distance) {
return 0.0; // TODO
}

///////////////////////////////////////////////////////////////////////////
// Private fields declared here describe completely the state of this robot.
// TODO: add private fields (neither static nor final).

// Static fields are shared by all robots of this class of robots.
// These fields are private, because they are accessed only by methods
// within this class. They are also final, because they are constants.
// That is, they cannot be modified after they have been initialized.
private static final double MPW = 10.0; // meters of go per watt
private static final double SPW = 2.0; // seconds of charge per watt
private static final double BCW = 1.0; // battery capacity, in watts
}

Mainly just constructing the robot is my problem because I tried some stuff but they kept coming back with an error or something.
• February 14th, 2010, 04:26 PM
mlan
Re: Robot help.
Hi!
So, I've been working on it and I think I did somethings right...
But now my question, main concern is:

How do I get the robot to turn/move?