Roman Number Generator. Enter 0 to quit. Enter a number between 1 and 9,999 Roman Numerals:I Enter a number between 1 and 9,999: 2 Roman Numerals: II Enter a number between 1 and 9,999 3 Roman Numerals: III Enter a number between 1 and 9,999: Roman Numerals: IX Enter a number between 1 and 9,999 28 Roman Numerals: XXVIII Enter a number between 1 and 9,999: 17 Roman Numerals XVII Enter a number between 1 and 9,999: 2017 Roman Numerals: MMXVII Enter a number between 1 and 9,999: Roman Numerals: Bye.
Note: Numbers greater then 3,999 require symbols with lines over letters. We can't use these, so use lower case v for 5000 and x for 10000.
The first 10 numbers are
- I
- II (1+1=2)
- III (1+1+1=3)
- IV (5-1=4)
- V
- VI (5+1=6)
- VII (5+2=7)
- VIII (5+3=8)
- IX (10-1=9)
- X
This pattern repeats for larger numbers. For example to create 47, we need to figure out 40 first. 4 was IV, there are equivalent 1, 5, and 10 symbols for the tens place. We can determine that 40 is XL since X is 10 and L is 50. We then combine this with 7 from above to get XLVII. Every value can be broken down into this basic 1-9 pattern just using different symbols.
(1) Create a function roman(num, one, five, ten) that takes a number between 1 and 9. The function returns a string with the roman representation using the strings given for the one, five, and ten symbols. If a number outside the range is given return the empty string "".
For example, Executing roman(4,"X","L","C") should return "XL"
(2) Create a function roman_num(num) that takes a number between 1 and 9,999 and returns it as a Roman Numeral. Return an empty string outside the range. Use the function from the previous step.
For example, executing roman_num(47) should return "XLVII".
(3) Create a main program that asks users for a number and prints it as a Roman Numeral. The program should run until the user enters 0. Use the functions from the previous steps. Print "Bye." when you exit. Remember to use if name=="main": so ZyBooks can test your functions.
Here is an example execution trace.
This code is for Python!
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