## Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

### Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

# The code of point is wrong

The code of point is wrong

robots.swift
class Machine {
var location: Point

init() {
self.location = Point(x: 0, y: 0)
}

func move(_ direction: String) {
print("Do nothing! I'm a machine!")
}
}

class Robot: Machine {
override func move(_ direction: String) {
switch direction {
case "Up":
self.location = Point(x: location.getX(), y:location.getY()+1)

case "Down":
self.location = Point(x: location.getX(), y:location.getY()-1)

case "Left":
self.location = Point(x: location.getX()-1, y:location.getY())

case "Right":
self.location = Point(x: location.getX()+1, y:location.getY())
default:
break
}
}
}

Hi Jarukorn,

You've nearly got that - within each case you want to amend the location property of the Robot. So, if direction is "Right", you want to increment location.x. "Up" means you want to increment location.y. The reverse is the case for the other directions. Use += and -= to do the adjustment.

You end up with something like:

class Robot : Machine {
override func move(_ direction: String){
switch direction{
case "Up":
location.y += 1
case "Down":
location.y -= 1
case "Right":
location.x += 1
case "Left":
location.x -= 1
default:
break
}
}
}

I hope that helps.

Steve.