更新示例代码 println() -> print()

source/chapter2/22_Protocols.md

@@ -164,9 +164,9 @@ class LinearCongruentialGenerator: RandomNumberGenerator {
 	}
 }
 let generator = LinearCongruentialGenerator()
-println("Here's a random number: \(generator.random())")
+print("Here's a random number: \(generator.random())")
 // 输出 : "Here's a random number: 0.37464991998171"
-println("And another one: \(generator.random())")
+print("And another one: \(generator.random())")
 // 输出 : "And another one: 0.729023776863283"
 ```
 
@@ -314,7 +314,7 @@ class Dice {
 ```swift
 var d6 = Dice(sides: 6,generator: LinearCongruentialGenerator())
 for _ in 1...5 {
-	println("Random dice roll is \(d6.roll())")
+	print("Random dice roll is \(d6.roll())")
 }
 //输出结果
 //Random dice roll is 3
@@ -403,16 +403,16 @@ class DiceGameTracker: DiceGameDelegate {
     func gameDidStart(game: DiceGame) {
         numberOfTurns = 0
         if game is SnakesAndLadders {
-            println("Started a new game of Snakes and Ladders")
+            print("Started a new game of Snakes and Ladders")
         }
-        println("The game is using a \(game.dice.sides)-sided dice")
+        print("The game is using a \(game.dice.sides)-sided dice")
     }
     func game(game: DiceGame, didStartNewTurnWithDiceRoll diceRoll: Int) {
         ++numberOfTurns
-        println("Rolled a \(diceRoll)")
+        print("Rolled a \(diceRoll)")
     }
     func gameDidEnd(game: DiceGame) {
-        println("The game lasted for \(numberOfTurns) turns")
+        print("The game lasted for \(numberOfTurns) turns")
     }
 }
 ```
@@ -468,7 +468,7 @@ extension Dice: TextRepresentable {
 
 ```swift
 let d12 = Dice(sides: 12,generator: LinearCongruentialGenerator())
-println(d12.asText())
+print(d12.asText())
 // 输出 "A 12-sided dice"
 ```
 
@@ -480,7 +480,7 @@ extension SnakesAndLadders: TextRepresentable {
 		return "A game of Snakes and Ladders with \(finalSquare) squares"
 	}
 }
-println(game.asText())
+print(game.asText())
 // 输出 "A game of Snakes and Ladders with 25 squares"
 ```
 
@@ -504,7 +504,7 @@ extension Hamster: TextRepresentable {}
 ```swift
 let simonTheHamster = Hamster(name: "Simon")
 let somethingTextRepresentable: TextRepresentable = simonTheHamster
-println(somethingTextRepresentable.asText())
+print(somethingTextRepresentable.asText())
 // 输出 "A hamster named Simon"
 ```
 
@@ -523,7 +523,7 @@ let things: [TextRepresentable] = [game,d12,simonTheHamster]
 
 ```swift
 for thing in things {
-	println(thing.asText())
+	print(thing.asText())
 }
 // A game of Snakes and Ladders with 25 squares
 // A 12-sided dice
@@ -583,7 +583,7 @@ extension SnakesAndLadders: PrettyTextRepresentable {
 任意`SankesAndLadders`的实例都可以使用`asPrettyText()`方法。
 
 ```swift
-println(game.asPrettyText())
+print(game.asPrettyText())
 // A game of Snakes and Ladders with 25 squares:
 // ○ ○ ▲ ○ ○ ▲ ○ ○ ▲ ▲ ○ ○ ○ ▼ ○ ○ ○ ○ ▼ ○ ○ ▼ ○ ▼ ○
 ```
@@ -624,7 +624,7 @@ struct Person: Named, Aged {
     var age: Int
 }
 func wishHappyBirthday(celebrator: protocol<Named, Aged>) {
-    println("Happy birthday \(celebrator.name) - you're \(celebrator.age)!")
+    print("Happy birthday \(celebrator.name) - you're \(celebrator.age)!")
 }
 let birthdayPerson = Person(name: "Malcolm", age: 21)
 wishHappyBirthday(birthdayPerson)
@@ -697,9 +697,9 @@ let objects: [AnyObject] = [
 ```swift
 for object in objects {
     if let objectWithArea = object as? HasArea {
-        println("Area is \(objectWithArea.area)")
+        print("Area is \(objectWithArea.area)")
     } else {
-        println("Something that doesn't have an area")
+        print("Something that doesn't have an area")
     }
 }
 // Area is 12.5663708
@@ -776,7 +776,7 @@ var counter = Counter()
 counter.dataSource = ThreeSource()
 for _ in 1...4 {
     counter.increment()
-    println(counter.count)
+    print(counter.count)
 }
 // 3
 // 6
@@ -807,7 +807,7 @@ counter.count = -4
 counter.dataSource = TowardsZeroSource()
 for _ in 1...5 {
     counter.increment()
-    println(counter.count)
+    print(counter.count)
 }
 // -3
 // -2