题目描述：给定一个整数，将其转为罗马数字。输入确保在 1 到 3999 的范围内。罗马数字包含以下七种字符： I， V， X， L，C，D 和 M。I对应1，V对应5，X对应10，L对应50，C对应100，D对应500，M对应1000
示例：输入: 1994 输出: "MCMXCIV" 解释: M = 1000, CM = 900, XC = 90, IV = 4.
java代码：
class Solution {
private static final int[] values = {1000,900,500,400,100,90,50,40,10,9,5,4,1};
private static final String[] symbols = {"M","CM","D","CD","C","XC","L","XL","X","IX","V","IV","I"};
public String intToRoman(int num) {
StringBuilder res = new StringBuilder();
int k = 0;
while (num>0) {
int count = num / values[k];
for (int i = 0;i<count;i++) {
res.append(symbols[k]);
num -= values[k];
}
k++;
}
return res.toString();
}
}
