Swift-類與結構體自測題

<pre name="code" class="python">1.有一個結構體和類，定義如下<pre name="code" class="java">struct Resolution {    var width = 0    var heigth = 0}class VideoMode {    var resolution = Resolution()    var interlaced = false    var frameRate = 0.0    var name: String?}

let hd = Resolution(width: 1920, height: 1080)var cinema = hdcinema.width = 2048println("cinema is now  \(cinema.width) pixels wide")<pre name="code" class="python">println("hd is now  \(hd.width) pixels wide")

上面當輸出語句分別輸出什麼。

let tenEighty = VideoMode()tenEighty.resolution = hdtenEighty.interlaced = truetenEighty.name = "1080i"tenEighty.frameRate = 25.0let alsoTenEighty = tenEightyalsoTenEighty.frameRate = 30.0println("The frameRate property of tenEighty is now \(tenEighty.frameRate)")

上面當輸出呢。

這就是實值型別和參考型別的區別。