/**
* 函数的定义和调用
*/
func showIntegerArray(array:[Int])
{
for a in array
{
println("\(a)")
}
}
showIntegerArray([1,2,3])
func maxOfValue(a:Int,b:Int) ->Int
{
return a > b ? a : b
}
println(maxOfValue(3,5))
func showHelloWord(){
println("Hello World")
}
showHelloWord()
let p0:(x:Double,y:Double) = (0,0)
let p1:(x:Double,y:Double) = (6,6)
func getLengthAndWidth(p0:(x:Double,y:Double),p1:(x:Double,y:Double)) -> (length: Double,width:Double){
return (abs(p0.1-p1.1),abs((p0.0-p1.0)))
}
let w = getLengthAndWidth(p0, p1).width
let len = getLengthAndWidth(p0, p1).length
println("\(len):\(w)")
/**
* 函数的内部参数和外部参数
*/
//func divisionOpertation(dividend a:Double,divsior b:Double) -> (Double)
//{
// return a / b
//}
//加#代表内外参数
func divisionOpertation(#dividend :Double,#divsior :Double) -> (Double)
{
return dividend / divsior
}
let res = divisionOpertation(dividend: 3.5, divsior: 1.2)
println(res)
/**
* 函数的默认参数
*/
//func joinString(s1: String,toString s2:String, joiner s3:String = "#")->(String)
//{
// return s1+s3+s2
//
//
//
//}
//默认参数可以放到任意位置
func joinString(s1: String,toString s2:String, joiner :String = "?")->(String)
{
return s1+joiner+s2
}
let str = joinString("hello", toString: "world" ,joiner:"#")
println(str)
/**
* 常量参数和变量参数
*/
//默认常量不能修改可以起到保护作用
//func swap(var a:Int,var b:Int)
//{
// let t = a
// a = b
// b = t
//}
func swap(inout a:Int,inout b:Int)
{
let t = a
a = b
b = t
}
/**
* 输入输出函数(inout)
*/
var x = 10
var y = 19
swap(&x, &y)
println("\(x),\(y)")
/**
* 变参函数
*/
