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Courses Plus Student 2,233 Pointsmethod overrride
I want to help with this test
class Point {
var x: Int
var y: Int
init(x: Int, y: Int) {
self.x = x
self.y = y
}
}
class Machine {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(_ direction: String) {
print("Do nothing! I'm a machine!")
}
}
// Enter your code below
class Robot : Machine {
override func move(_ direction: String) {
if direction == "Up"{
self.location = Point(x: 0, y: 1)
}else{
if direction == "Down"{
self.location = Point(x: 0, y: 1)
}else{
if direction == "Left"{
self.location = Point(x: 1, y: 0)
}else{
if direction == "Right"{
self.location = Point(x: 1, y: 0)
}else{
self.location = Point(x: 0, y: 0)
}}}}
}
}
3 Answers
Thomas Dobson
7,511 PointsMohammed,
You struggled quite a bit with your If statements syntax. In addition your not really setting your location correctly. Your setting location to a specific point. For example up will take you to (0,1) instead of moving your y axis up by 1.
Here is how your code should have looked:
class Point {
var x: Int
var y: Int
init(x: Int, y: Int) {
self.x = x
self.y = y
}
}
class Machine {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(_ direction: String) {
print("Do nothing! I'm a machine!")
}
}
// Enter your code below
class Robot : Machine
{
override func move(_ direction: String)
{
if direction == "Up"
{
location.y += 1
}
else if direction == "Down"
{
location.y -= 1
}
else if direction == "Left"
{
location.x -= 1
}
else if direction == "Right"
{
location.x += 1
}
}
}
furthermore I wanted to provide you a switch version of code as well. We strive for readability with Swift, that if statement is scary and I think is better represented using a switch statement.
class Point {
var x: Int
var y: Int
init(x: Int, y: Int) {
self.x = x
self.y = y
}
}
class Machine {
var location: Point
init() {
self.location = Point(x: 0, y: 0)
}
func move(_ direction: String) {
print("Do nothing! I'm a machine!")
}
}
// Enter your code below
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: print("Invalid Movement Command")
}
}
}
Much easier to read if you ask me!
Be sure you understand the concepts from this code challenge. They are pretty important moving forward!
Unsubscribed User
Courses Plus Student 2,233 PointsThanks, I thought the shapes were just in (override Initializer)
Unsubscribed User
Courses Plus Student 2,233 PointsI want to ask about a problem in (Xcode), regarding the output screen
the proplem is (lldb_expr_152)
it's every-time appear