class rectangle { var width: double var height: double init(width: double, height: double) { self.width = width self.height = height } init(w width: double,h height: double){ self.width = width self.height = height } init(length: double) { self.width = length self.height = length } init() { self.width = 640.0 self.height = 940.0 } } var rectc1 =rectangle(width: 320.0, height: 480.0) print("长方形:\(rectc1.width) x\(rectc1.height)") var rectc2 = rectangle(w: 320.0, h: 480.0) print("长方形:\(rectc2.width) x\(rectc2.height)") var rectc3 =rectangle(length: 500.0) print("长方形3:\(rectc3.width) x\(rectc3.height)") var rectc4 = rectangle() print("长方形4:\(rectc4.width) x\(rectc4.height)")
struct rectangle { var width: double var height: double init(width: double, height: double) { self.width = width self.height = height } init(w width: double,h height: double){ self.width = width self.height = height } init(length: double) { //调用了self.init语句 self.init(w: length, h: length) } init() { //调用了self.init语句 self.init(width: 640.0, height: 940.0) } } var rectc1 =rectangle(width: 320.0, height: 480.0) print("长方形:\(rectc1.width) x\(rectc1.height)") var rectc2 = rectangle(w: 320.0, h: 480.0) print("长方形:\(rectc2.width) x\(rectc2.height)") var rectc3 =rectangle(length: 500.0) print("长方形3:\(rectc3.width) x\(rectc3.height)") var rectc4 = rectangle() print("长方形4:\(rectc4.width) x \(rectc4.height)")
class rectangle { var width: double var height: double init(width: double, height: double){ self.width = width self.height = height } init(w width: double,h height: double){ self.width = width self.height = height } convenience init(length: double) { self.init(w: length, h: length) } convenience init() { self.init(width: 640.0, height: 940.0) } } var rectc1 =rectangle(width: 320.0, height: 480.0) print("长方形:\(rectc1.width) x\(rectc1.height)") var rectc2 = rectangle(w: 320.0, h: 480.0) print("长方形:\(rectc2.width) x\(rectc2.height)") var rectc3 =rectangle(length: 500.0) print("长方形3:\(rectc3.width) x\(rectc3.height)") var rectc4 = rectangle() print("长方形4:\(rectc4.width) x\(rectc4.height)")
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