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.
Start your free trialLinus Karlsson
7,402 PointsThe count for superEnemy.life displays 2 not 50
The problem for me is as clear as the headline for the question: The count for superEnemy.life displays 2 not 50
What am I doing wrong?
let x1 = 0
let y1 = 0
let coordinate1: (x: Int, y: Int) = (0,0)
coordinate1.x
struct Point {
let x: Int
let y: Int
init(x: Int, y: Int) {
self.x = x
self.y = y
}
/// Returns the surrounding points in range of
/// the current one
func points(inRange range: Int = 1) -> [Point]{
var results = [Point]()
let lowerBoundOfXRange = x - range
let upperBoundOfXRange = x + range
let lowerBoundOfYRange = y - range
let upperBoundOfYRange = y + range
for xCoordinate in lowerBoundOfXRange...upperBoundOfXRange {
for yCoordinate in lowerBoundOfYRange...upperBoundOfYRange {
let coordinatePoint = Point(x: xCoordinate, y: yCoordinate)
results.append(coordinatePoint)
}
}
return results
}
}
let coordinatePoint = Point(x: 0, y: 0)
coordinatePoint.x
coordinatePoint.points()
// Enemies
class Enemy {
var life: Int = 2
let position: Point
init(x: Int, y: Int) {
self.position = Point(x: x, y: y)
}
func decreaseLife(by factor: Int) {
life -= factor
}
}
class SuperEnemy: Enemy {
let isSuper: Bool = true
override init(x: Int, y: Int) {
super.init(x: x, y: y)
self.life = 50
}
}
// Towers
class Tower {
let position: Point
var range: Int = 1
var strenght: Int = 1
init(x: Int, y: Int) {
self.position = Point(x: x, y: y)
}
func fire(at enemy: Enemy) {
if isInRange(of: enemy) {
enemy.decreaseLife(by: strenght)
print("Gotcha")
} else {
print("Darn! Out of range!")
}
}
func isInRange(of enemy: Enemy) -> Bool {
let availablePositions = position.points(inRange: range)
for point in availablePositions {
if point.x == enemy.position.x && point.y == enemy.position.y {
return true
}
}
return false
}
}
let tower = Tower(x: 0, y: 0)
let enemy = Enemy(x: 1, y: 1)
let superEnemy = Enemy(x: 1, y: 1)
superEnemy.life
tower.fire(at: enemy)
1 Answer
Dave Harker
Courses Plus Student 15,510 PointsHi Linus Karlsson,
Really close mate, but when you instantiate your superEnemy ... use the SuperEnemy class not Enemy.
Happy coding,
Dave
Linus Karlsson
7,402 PointsLinus Karlsson
7,402 PointsYou're absolutely right, Dave! I noticed my mistake by myself after posting this which made me happy to at least problem solve on my own.
Thank you for your help!