作業 Swift列舉 類 派生 協議

此次作業為第二個作業《swift類的屬性與方法》的補充，照常，先貼要求

定義gender列舉

//性別的列舉

enum gender: int 
}

//公寓的列舉

enum department 

//學校協議

protocol schoolprotocol 
func lendbook()
}

//人類

class person: customstringconvertible 
}//構造方法
init(firstname: string, lastname: string, age: int, gender: gender) 
convenience init(firstname: string, age: int, gender: gender) 
convenience init(firstname: string) 
required convenience init() 
//過載==
static func ==(lhs: person, rhs: person) -> bool 
//過載!=
static func !=(lhs: person, rhs: person) -> bool 
//實現customstringconvertible協議中的計算屬性，可以使用print直接輸出物件內容
var description: string 
//輸出person *** is running
func run() 
}var p1 = person(firstname: "張")
var p2 = person(firstname: "張", age: 20, gender: .male)
print(p1) //輸出fullname: 張, age: 0, gender: male
print(p1 == p2) //輸出false
print(p1 != p2) //輸出true

//教師類

class teacher: person, schoolprotocol 
init(title: string, department: department) 
convenience required init() 
//重寫父類的計算屬性
override var description: string 
//過載父類run方法
override func run() 
//遵循協議的方法
func lendbook() 
}var t1 = teacher(title: "hello", department: .one)
print(t1) //輸出title: hello, fullname: , age: 0, gender: unknow, department: one

//學生類

class student: person, schoolprotocol 
init(stuno: int, department: department) 
required convenience init() 
//重寫父類的計算屬性
override var description: string 
//過載父類run方法
override func run() 
//遵循協議的方法
func lendbook() 
}var s1 = student(stuno: 2015110101, department: .two)
print(s1) //輸出stuno: 2015110101, fullname: , age: 0, gender: unknow, department: two

//初始化乙個空的person陣列

var array = [person]()
//生成5個person物件
for i in
1...5 //生成3個teacher物件
for i in
1...3 //生成4個student物件
for i in
1..<5 
//定義乙個字典，用於統計每個類的物件個數
var dict = ["person": 0, "teacher": 0, "student": 0]
foritem
in array else
ifitem is student else 
}//輸出字典值
for (key, value) in dict 
//原始陣列
print("------------------------------")
foritem
in array 
//根據age從大到小排序
print("------------------------------")
array.sort 
foritem
in array 
//根據全名從前往後排序
print("------------------------------")
array.sort 
foritem
in array 
//根據gender和age從大往小排序
print("------------------------------")
array.sort 
foritem
in array 
//窮舉，呼叫run方法和lendbook方法
print("------------------------------")
foritem
in array else
if let student = item
as? student 
}

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