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| Language | Swift |
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| Owner | w3xue |
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| Modified | |
| Visibility | Public |
class SuperClass {
var corners = 4
var description: String {
return "\(corners) 边"
}
}
let rectangle = SuperClass()
print("矩形: \(rectangle.description)")
class SubClass: SuperClass {
override init() { //重载构造器
super.init()
corners = 5
}
}
let subClass = SubClass()
print("五角型: \(subClass.description)")
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