Swift 程序判断给定数字是否为强数

import Foundation
import Glibc

// Function to check if te given number is strong or not
func CheckStrongNumber(num: Int) -> Bool {
   var originalNum = num
   var sum = 0
    
   // Finding the sum of the factorial 
   // of the digits of the given number
   while originalNum > 0 {
    
      // Calculating the factorial of the digit
      let lDigit = originalNum % 10
      var factorial = 1
      for x in 1...lDigit {
         factorial *= x
      }
        
      // Calculating the sum of the factorial 
      // of the digits of the given number
      sum += factorial
      originalNum /= 10
   }
    
   // Return true if the sum and the number is equal
   // Otherwise return false
   return sum == num
}

// Test case 1
let myInput = 345
if CheckStrongNumber(num: myInput) {
   print("YES! \(myInput) is a strong number.")
} else {
   print("NO! \(myInput) is not a strong number.")
}

// Test case 2
let myInput2 = 145
if CheckStrongNumber(num: myInput2) {
   print("YES! \(myInput2) is a strong number.")
} else {
   print("NO! \(myInput2) is not a strong number.")
}