200612.md

12 - 6 - 2020 題目

編寫一段代碼，輸入一個正整數，求解該整數的位數並逆序打印各位數

我的解答

def checkValid(n):
    try:
        if int(n) < 0:
            return False
        if n == "-0":
            return False
    except ValueError:
        return False

def askNumber(n):
    global num
    if n == 0:
        num = input('Enter any positive number:')
    else:
        num = input('Please enter any positive number again:')

askNumber(0)

while True:
    if checkValid(num) == False:
        askNumber(1)
    else:    
        print("")
        print('There are',len(num),'digits in total')
        print('And the descending order is following:')

        reversedArray = reversed(num)
        print(*reversedArray, sep=", ")
        break

其他人的解答

while True:
	a = input('Enter a positive num: ')
  try:
    b = int(a)
    if b > 0:
      break
    else:
      pass
  
  except:
    pass

print(f'The input postive num has {len(a)} digits')
b = a[::-1]
for i in b:
  print(int(i),end = ' ')

輸出結果：

Enter a positive num: asdf
Enter a positive num: -83224
Enter a positive num: 0
Enter a positive num: 23489


The input postive num has 5 digits
9 8 4 3 2