IntegerToRoman.java ( File view )

  • By issaczr 2014-10-24
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			// Author:   Li Long, 1988lilong@163.com
// Date:     Apr 18, 2014
// Source:   http://oj.leetcode.com/problems/integer-to-roman/
// Analysis: http://blog.csdn.net/lilong_dream/article/details/22869803

// Given an integer, convert it to a roman numeral.
// Input is guaranteed to be within the range from 1 to 3999.

public class IntegerToRoman {

	public String intToRoman(int num) {

		int[] base = {
 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 
};
		String[] roman = {
 "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X",
				"IX", "V", "IV", "I" 
};

		String result = "";

		for (int i = 0; num > 0; ++i) {

			int count = num / base[i];
			num %= base[i];

			while (count > 0) {

				result += roman[i];
				--count;
			
}
		
}

		return result;
	
}
	
	public static void main(String[] args) {

		IntegerToRoman slt = new IntegerToRoman();
		System.out.println(slt.intToRoman(321));
	
}

}			
...
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