LeetCode，leetcodeoj

LeetCode，leetcodeoj

題目：

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

思路：

把幾個特殊的值指明出來。

package manipulation;public class IntegerToRoman {    public String intToRoman(int num) {        int[] nums = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4 ,1};        String[] symbols = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};        String res = "";        for (int i = 0; num > 0 && i < 13; ++i) {            int times = num / nums[i];            num = num % nums[i];            for (; times > 0; --times)                res += symbols[i];        }                return res;    }        public static void main(String[] args) {        // TODO Auto-generated method stub        IntegerToRoman i = new IntegerToRoman();        System.out.println(i.intToRoman(19));    }}