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toDecimal_toRoman.py
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toDecimal_toRoman.py
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# Autor: Paulo Henrique Diniz de Lima Alencar
decimal = [1, 4, 5, 9, 10, 40, 50, 90, 100, 400, 500, 900, 1000]
roman = ['I','IV', 'V', 'IX', 'X', 'XL', 'L', 'XC', 'C', 'CD', 'D', 'CM', 'M']
# Funcao: reponsavel pela conversao de numero romano para decimal.
def toDecimal(roman_number=""):
if roman_number == "":
return None
digits = []
i = 0
while (i < len(roman_number)):
if roman_number[i:i+2] in roman:
digits.append(decimal[roman.index(roman_number[i:i+2])])
i = i + 2
elif roman_number[i] in roman:
digits.append(decimal[roman.index(roman_number[i])])
i = i + 1
else:
i = i + 1
return f'{roman_number}: {sum(digits)}'
# Funcao: reponsavel pela conversao de numero decimal para romano.
def toRoman(decimal_number):
if not (decimal_number >= 1 and decimal_number <= 3999):
return "Invalid number!"
root_number = decimal_number
roman_number = ""
new_decimal = decimal[:]
new_decimal.reverse()
for base_value in new_decimal:
if base_value <= decimal_number:
while True:
repetitions = decimal_number // base_value
decimal_number = decimal_number % base_value
if repetitions == 0:
break
while repetitions:
roman_number += roman[decimal.index(base_value)]
repetitions -= 1
if decimal_number == 0:
return f'{root_number}: {roman_number}'
print(toDecimal("IV"))
print(toDecimal("VII"))
print(toDecimal("CIX"))
print(toRoman(199))
print(toRoman(200))
print(toRoman(1000))
print(toRoman(4))
print(toRoman(109))
print(toRoman(3549))
print(toRoman(45))
print(toRoman(4000))
print(toRoman(2923))