@H_502_0@import Foundation

@H_502_0@func sayhello(name:String) ->String {

@H_502_0@ let greeting = "hello" + name + "!"

@H_502_0@ return greeting

@H_502_0@}

println(sayhello("anna"))

@H_502_0@func minusresult(start: Int,end :Int) ->Int {

@H_502_0@ return end - start

@H_502_0@}

println(minusresult(1,10))

//无返回值

@H_502_0@func saygoodbye(name: String) {

println("goodbye,\(name)")

@H_502_0@}

println(saygoodbye("dave"))

//函数调用！！！！！！！！

@H_502_0@func count(string: String) -> (vs:Int,cs:Int,os:Int){

@H_502_0@ var vowels = 0,consonants = 0,others = 0

@H_502_0@ for character in string {

@H_502_0@ switch String(character).lowercaseString {

@H_502_0@ case "a","e","i","o","u":

@H_502_0@ ++vowels

@H_502_0@ case "b","c","d","f","g":

@H_502_0@ ++consonants

@H_502_0@ default:

@H_502_0@ ++others

@H_502_0@ }

@H_502_0@ }

@H_502_0@ return (vowels,consonants,others)

@H_502_0@}

let total = count("some arbitry")

println("\(total.vs) vowels and \(total.cs) consonants")

/*

func join(s1: String,s2: String,joiner:String) ->String {

return s1 + joiner + s2

}

println(join("hello","world",","))

*/

//每一个都有两个名字 比如 string和s1

@H_502_0@func join(string s1:String,tostring s2:String,withjoiner joiner:String) ->String {

@H_502_0@ return s1 + joiner + s2

@H_502_0@}

@H_502_0@println(join(string : "hello",tostring : "hi",withjoiner : ","))

//简写

//#作为局部外部参数名

@H_502_0@func containcharacter(#string : String,#charactertofind:Character) ->Bool {

@H_502_0@ for character in string {

@H_502_0@ if character == charactertofind {

@H_502_0@ return true

@H_502_0@ }

@H_502_0@ }

return false

@H_502_0@}

@H_502_0@let containasvee = containcharacter(string: "asdada",charactertofind:"a" )

println(containasvee)

@H_502_0@func join(string s1:String,string s2:String,withjoiner joiner:String = ",")->String {

@H_502_0@ return s1 + joiner + s2

@H_502_0@}

@H_502_0@let str1 = join(string:"hefe",tostring: "dawwq",withjoiner: "-")

println(str1)

//joiner有默认值 所以下面要写上

@H_502_0@func join(s1:String,s2:String,joiner: String = " ")->String {

@H_502_0@ return s1 + joiner + s2

@H_502_0@}

@H_502_0@let str3 = join("hello","world",joiner:"-")

println(str3)

//可变参数

@H_502_0@func mean(numbers:Double...)->Double {

@H_502_0@ var total:Double = 0

@H_502_0@ for number in numbers {

@H_502_0@ total += number

@H_502_0@ }

@H_502_0@ return total / Double(numbers.count)

@H_502_0@}

println(mean(1.1,2.2,3.1,4.5))

@H_502_0@func mean2(lala: Double...) ->Double {

@H_502_0@ var total1: Double = 0

@H_502_0@ for lala2 in lala {

@H_502_0@ total1 += lala2

@H_502_0@ }

@H_502_0@return total1 / Double(lala.count)

@H_502_0@}

println(mean2(2.3,5.4))

/*

func alignright(var string:String,count: Int,pad:Character) ->String {

let amounttopad = count - count(string)

for

*/

let label = "The width is"

@H_502_0@let width = 94

@H_502_0@let widthLabel = label + String(width)

println(widthLabel)

//输入输出函数

@H_502_0@func swaptwoints(inout a :Int,inout b:Int){

@H_502_0@ let temp = a

@H_502_0@ a = b

@H_502_0@ b = temp

@H_502_0@}

@H_502_0@var someint = 3

@H_502_0@var anotherint = 7

//作为输入输出参数时

swaptwoints(&someint,&anotherint)

println("someint is now \(someint),and anotherint is now \(anotherint)")

/*

let interestingnumbers = [

"prime":[2,3,5,7,11,13],

"fibonacci":[1,1,2,8],

"square":[1,4,9,16,25],

]

var largest = 0

for (kind,numbers) in interestingnumbers {

for number in numbers {

if number > largest {

largest = number

}

}

}

println(largest)

var n = 2

while n < 100 {

n = n * 2

}

print(n)

var m = 2

do {

m = m * 2

}while m < 100

print(m)

var firstforloop = 0

for i in 0..<4 {

firstforloop += i

}

println(firstforloop)

//使用..<创建的范围不包含上界，如果想包含的话需要使用...。

func calculateStatistics(scores: [Int]) -> (min: Int,max: Int,sum: Int) {

var min = scores[0]

var max = scores[0]

var sum = 0

for score in scores {

if score > max {

max = score

} else if score < min {

min = score

}

sum += score

}

return (min,max,sum)

}

let statistics = calculateStatistics([5,100,9])

print(statistics.sum)

print(statistics.2)

func returnFifteen() -> Int {

var y = 10

func add() {

y += 5

}

add()

return y

}

returnFifteen()

func makeIncrementer() -> (Int -> Int) {

func addOne(number: Int) -> Int {

return 1 + number

}

return addOne

}

var increment = makeIncrementer()

increment(7)

*/

//函数类型：1，定义函数，2，定义函数类型变量或常量3，给函数类型赋值

@H_502_0@func addtowints(a : Int,b: Int) -> Int {

@H_502_0@ return a + b

@H_502_0@}

@H_502_0@var mathfunction:(Int,Int) ->Int //函数类型

mathfunction = addtowints // 赋值

println("result:\(mathfunction(2,3))")

@H_502_0@func sum(a: Int,b :Int ) -> Int {

@H_502_0@ return a - b

@H_502_0@}

@H_502_0@var mathfunction2:(Int,Int) ->Int = sum

println(mathfunction2(2,5))

@H_502_0@func printmathresult(mathfun:(Int,Int)-> Int,a :Int,b : Int){

@H_502_0@ println("result:\(mathfun(a,b))")

@H_502_0@}

printmathresult(addtowints,1,2)

@H_502_0@func stepForward(input: Int) ->Int {

@H_502_0@ return input + 1

@H_502_0@}

@H_502_0@func stepbackward(input:Int) ->Int {

@H_502_0@ return input - 1

@H_502_0@}

@H_502_0@func choosestepfunction(backwards: Bool) -> (Int) -> Int {

return backwards ? stepbackward : stepForward

@H_502_0@}

@H_502_0@var currentvalue = 3

@H_502_0@let movenearertozero = choosestepfunction(currentvalue > 0)

println("movenearertozero:\(movenearertozero)")

@H_502_0@let base = 3

@H_502_0@let power = 10

@H_502_0@var answer = 1

@H_502_0@for _ in 1...power {

answer *= base

@H_502_0@}

println(answer)

@H_502_0@let names = ["1","2","3"]

@H_502_0@for name in names {

@H_502_0@ println(name)

@H_502_0@}

@H_502_0@let numberoflegs = ["spider":8,"ant":10,"cat":4]

@H_502_0@for (animalname,legs) in numberoflegs{

@H_502_0@ println("\(animalname) has \(legs)")

@H_502_0@}

@H_502_0@for character in "hello" {

@H_502_0@ println(character)

@H_502_0@}

@H_502_0@for var index=0;index<3 ;++index {

@H_502_0@ println(index)

@H_502_0@}

@H_502_0@var va = 1

@H_502_0@while va < 5 {

println("while index is \(va)")

@H_502_0@ va++

@H_502_0@}

@H_502_0@var vb = 1

@H_502_0@do {

@H_502_0@ println("is \(vb)")

@H_502_0@ vb++

@H_502_0@}while vb < 5