1--
private func exchangeStr(str:String) -> String{
return str.replacingOccurrences(of: " ", with: "%20")
}
2--
override func viewDidLoad() {
super.viewDidLoad()
print( addTwo(str1: "4->6->3", str2: "9->8->7") )
}
private func addTwo(str1:String,str2:String) -> String{
let strArr1 = str1.components(separatedBy: "->")
let strArr2 = str2.components(separatedBy: "->")
var emptyStr1 = ""
var emptyStr2 = ""
for i in strArr1.reversed() {
emptyStr1 += i
}
for i in strArr2.reversed() {
emptyStr2 += i
}
let countNum = Int(emptyStr1)! + Int(emptyStr2)!
let countStr = String(countNum)
var finalStr = ""
for char in countStr.reversed() {
finalStr = finalStr + String(char) + "->"
}
let index = finalStr.index(finalStr.endIndex, offsetBy: -2)
return String(finalStr[..<index])
}
3--
private func calculateMaxCount(ladder: UInt) -> UInt{
guard ladder != 0 else {
print("不能為0")
return 0
}
switch ladder {
case 1:
return 1
case 2 :
return 2
case 3:
return 4
default:
return calculateMaxCount(ladder: ladder - 1) + calculateMaxCount(ladder: ladder - 2) + calculateMaxCount(ladder:ladder - 3)
}
}
