Swift cannot print to console using the terminator argument - printing

Question

I am making making a command line application to learn swift and OOP programming. My code works fine in the Xcode debugger (I see the input and output just fine), however when I archive and export my project, I for some reason cannot see the output of the print function.
Here is an example of what I mean.
Debugging in Xcode:
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
Option: 0
Username: User
Password: Pass
User: User sucsessully added to the system
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
Option: 1
User
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
Option: 0
Username: User2
Password: Pass
User: User2 sucsessully added to the system
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
Option: 1
User
User2
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
Option: 2
Delete user: User2
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
Option: 1
User
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
Option: 3
Program ended with exit code: 0
Now when I run the archived exported command line application in terminal:
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
0
User
Pass
Option: Username: Password: User: User sucsessully added to the system
Welcome to the login system
-----------------------------
Add a user [0]
List users [1]
Delete user [2]
Quit System [3]
-------------------------------
3
As you can see, the program registers my input and sometimes prints.
I have tried to take away the terminator: "" away from the print function to see if that is the issue and it printed just fine. This seems to be an issue with the terminator argument. I have also tried to replace the "" to " " for the terminator argument and it still doesn't work.
Why is it I cannot output to the console with the terminator argument?
Here is the code:
import Foundation
var running:Bool = true
let loginSystem = LoginSystem()
repeat
{
print("Welcome to the login system")
print("-----------------------------\n")
print("Add a user [0]")
print("List users [1]")
print("Delete user [2]")
print("Quit System [3]")
print("-------------------------------")
printToConsole("Option: ")
let option = input().intValue
//Add a user
if option == 0
{
print("Username: ", terminator: " ")
let username = input()
print("Password: ", terminator: " ")
let password = input()
print("User: \(username) sucsessully added to the system")
loginSystem.addUser(username, password: password, uid: 0, guid: 0)
//List users
} else if option == 1 {
let users = loginSystem.getUsers()
printArray(users)
//Delete user
} else if option == 2 {
printToConsole("Delete user: ")
let user = input()
loginSystem.deleteUser(user)
//Quit
} else if option == 3 {
running = false
}
clear()
} while running
print("")
printArray(theArray: [AnyObject]):
func printArray(theArray:[AnyObject])
{
for item in theArray
{
print("\(item)")
}
}
clear()
func clear()
{
let clearCommand = "if [ -n \"$STY\" ]; then clear; fi"
system(clearCommand)
}
input()
func input() -> String {
let keyboard = NSFileHandle.fileHandleWithStandardInput()
let inputData = keyboard.availableData
let strData = NSString(data: inputData, encoding: NSUTF8StringEncoding)!
return strData.stringByTrimmingCharactersInSet(NSCharacterSet.newlineCharacterSet())
}
intVal
extension String
{
var intValue:Int
{
return Int(self)!
}
}

Answer 1

try
repeat
{
fflush(stdout)
print("Welcome to the login system")