func replace(myString:String,index:Int,newCharac:Character) -> String {
// Write correct code here
return modifiedString
}
例如,replace(“House”,2,“r”)应等于“Horse”.
func replace(myString:String,index:Int,newCharac:Character) -> String {
// Write correct code here
return modifiedString
}
例如,replace(“House”,2,“r”)应等于“Horse”.
