RosettaCodeData/Task/Roman-numerals-Decode/FutureBasic/roman-numerals-decode.basic

34 lines
981 B
Plaintext

window 1
local fn RomantoDecimal( roman as CFStringRef ) as long
long i, n, preNum = 0, num = 0
for i = len(roman) - 1 to 0 step -1
n = 0
select ( fn StringCharacterAtIndex( roman, i ) )
case _"M" : n = 1000
case _"D" : n = 500
case _"C" : n = 100
case _"L" : n = 50
case _"X" : n = 10
case _"V" : n = 5
case _"I" : n = 1
end select
if ( n < preNum ) then num = num - n else num = num + n
preNum = n
next
end fn = num
print @" MCMXC = "; fn RomantoDecimal( @"MCMXC" )
print @" MMVIII = "; fn RomantoDecimal( @"MMVIII" )
print @" MMXVI = "; fn RomantoDecimal( @"MMXVI" )
print @"MDCLXVI = "; fn RomantoDecimal( @"MDCLXVI" )
print @" MCMXIV = "; fn RomantoDecimal( @"MCMXIV" )
print @" DXIII = "; fn RomantoDecimal( @"DXIII" )
print @" M = "; fn RomantoDecimal( @"M" )
print @" DXIII = "; fn RomantoDecimal( @"DXIII" )
print @" XXXIII = "; fn RomantoDecimal( @"XXXIII" )
HandleEvents