//1.類的定義
//類由屬性和方法構(gòu)成
class Person{
//定義屬性
var name:String = ""
var sex:String = ""
var age:Int = 0

//定義方法
func say(){
    print("你好")
}

}

//2.實(shí)例化對(duì)象
var p1 = Person()

//訪問屬性和方法
p1.name = "張三"
p1.sex = "男"
p1.age = 18
print(p1.name)
print(p1.age)

//3.類是引用類型
var p2 = p1
p2.name = "小紅"
p2.sex = "女"
p2.age = 13

//猜猜執(zhí)行結(jié)果
print(p1.name)
print(p1.sex)
print(p1.age)

//4.如何判斷是否引用了同一個(gè)實(shí)例
print(p1===p2)
let p3 = Person()
print(p1===p3)