var values = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1]; var symbols = ["m", "cm", "d", "cd", "c", "xc", "l", "xl", "x", "ix", "v", "iv", "i"]; function to_roman(n) { var out = ""; for (var i = 0; i < values.length; i++) { while (n >= values[i]) { out += symbols[i]; n -= values[i]; } } return exceed.str.upper(out); } function roman_value(ch) { if (ch === "i") return 1; if (ch === "v") return 5; if (ch === "x") return 10; if (ch === "l") return 50; if (ch === "c") return 100; if (ch === "d") return 500; if (ch === "m") return 1000; return -1; } function is_all_digits(s) { if (s.length === 0) return false; for (var i = 0; i < s.length; i++) { var c = s.charCodeAt(i); if (c < 48 || c > 57) return false; } return true; } function from_roman(s) { var total = 0; for (var i = 0; i < s.length; i++) { var cur = roman_value(s.charAt(i)); if (cur < 0) return -1; var next = i + 1 < s.length ? roman_value(s.charAt(i + 1)) : 0; if (next > cur) total -= cur; else total += cur; } return total; } var args = exceed.args; if (args.length === 0) { exceed.reply("usage: " + exceed.prefix + "roman <1..3999 | roman numerals>"); exceed.stop(); } var arg = exceed.str.trim(args[0]); var lowered = exceed.str.lower(arg); if (is_all_digits(arg)) { var n = parseInt(arg, 10); if (n < 1 || n > 3999) { exceed.reply("number must be between 1 and 3999"); exceed.stop(); } exceed.reply(n + " = " + exceed.fmt.code(to_roman(n))); } else { var ok = true; for (var i = 0; i < lowered.length; i++) { if (roman_value(lowered.charAt(i)) < 0) { ok = false; break; } } if (!ok) { exceed.reply("invalid input. usage: " + exceed.prefix + "roman <1..3999 | roman numerals>"); exceed.stop(); } var val = from_roman(lowered); if (val < 1 || val > 3999 || to_roman(val) !== exceed.str.upper(lowered)) { exceed.reply("invalid roman numerals. usage: " + exceed.prefix + "roman <1..3999 | roman numerals>"); exceed.stop(); } exceed.reply(exceed.str.upper(lowered) + " = " + exceed.fmt.code(String(val))); }

/roman