## STRUCTS
Structs（結構體） 是一種復雜數據類型，包含了多個值，通過 struct 關鍵字定義一個結構體：
~~~
struct Person {
var clothes: String
var shoes: String
}
~~~
Swift 讓你非常簡單地創建一個結構體變量，只需要將初始值傳入即可：
~~~
let taylor = Person(clothes: "T-shirt", shoes: "sneakers")
let other = Person(clothes: "short skirts, shoes: "high heels")
~~~
通過結構體變量名以及屬性名來訪問屬性的值：
~~~
print(taylor.clothes)
print(other.shoes)
~~~
Swift 有一個名為"copy on write"的機制，當你將一個結構體變量賦給另一個變量時，會獨立拷貝一份：
~~~
struct Person {
var clothes: String
var shoes: String
}
let taylor = Person(clothes: "T-shirts", shoes: "sneakers")
let other = Person(clothes: "short skirts", shoes: "high heels")
var taylorCopy = taylor
taylorCopy.shoes = "flip flops"
taylor //(clothes: "short skirts", shoes: "high heels")
taylorCopy //(clothes: "short skirts", shoes: "flip flops")
~~~
