25 lines
815 B
Kotlin
25 lines
815 B
Kotlin
// version 1.0.6
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fun romanDecode(roman: String): Int {
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if (roman.isEmpty()) return 0
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var n = 0
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var last = 'O'
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for (c in roman) {
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when (c) {
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'I' -> n += 1
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'V' -> if (last == 'I') n += 3 else n += 5
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'X' -> if (last == 'I') n += 8 else n += 10
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'L' -> if (last == 'X') n += 30 else n += 50
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'C' -> if (last == 'X') n += 80 else n += 100
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'D' -> if (last == 'C') n += 300 else n += 500
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'M' -> if (last == 'C') n += 800 else n += 1000
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}
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last = c
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}
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return n
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}
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fun main(args: Array<String>) {
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val romans = arrayOf("I", "III", "IV", "VIII", "XLIX", "CCII", "CDXXXIII", "MCMXC", "MMVIII", "MDCLXVI")
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for (roman in romans) println("${roman.padEnd(10)} = ${romanDecode(roman)}")
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}
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