python 程式設計50題測試範例-20

２０、參考第18題，輸入阿拉伯數字，轉成羅馬數字。

程式:
#coding=utf8

list_thos=["","M","MM","MMM","MMMM",]
list_hund=["","C","CC","CCC","CD", "D", "DC", "DCC", "DCCC", "CM",]
list_ten=["", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC",]
list_one=["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX",]

print("２０、輸入阿拉伯數字，轉成羅馬數字。")
print("#")
print("#           M 1000 ")
print("#           D 500 ")
print("#           C 100 ")
print("#           L 50 ")
print("#           X 10 ")
print("#           V 5 ")
print("#           I 1 ")
    
while True:
     x=int(input("請你輸入數字 (小於5000)："))
     try:
        x = int(x)
       
     except ValueError:
       print ('這是不合法的輸入.  請再輸入一次...')
       continue
        
     if ( x > 0 and x < 5000 ):
       break

thos=int(x/1000)
hund=int((x/100)%10)
ten=int((x/10)%10)
one=int((x%10))
print("=============================")
print(thos,"\t",hund,"\t",ten,"\t",one)

thos1=list_thos[thos]
hund1=list_hund[hund]
ten1=list_ten[ten]
one1=list_one[one]
print("=============================")
print(thos1,"\t",hund1,"\t",ten1,"\t",one1)

print("=============================")
AllChar=thos1+hund1+ten1+one1
print("輸入數字 :",x ,"  羅馬數字:",AllChar)


結果:
>>> 
================= RESTART: D:/程式語言 Python 入門/50題/Ex50-20.py =================
２０、輸入阿拉伯數字，轉成羅馬數字。
#
#           M 1000
#           D 500
#           C 100
#           L 50
#           X 10
#           V 5
#           I 1
請你輸入數字 (小於5000)：5698
請你輸入數字 (小於5000)：457
=============================
0 4 5 7
=============================
  CD L VII
=============================
輸入數字 : 457   羅馬數字: CDLVII
>>>