12. Integer to Roman (Map)

Given an integer, convert it to a roman numeral.

Input is guaranteed to be within the range from 1 to 3999.

 

class Solution {

public:

    string intToRoman(int num) {

        int values[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 }; //数组的初始化

        string numerals[] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I" };

        int size = sizeof(values) / sizeof(values[0]); //获取数组的大小

        string result = "";



        for (int i = 0; i < size; i++) {

            while (num >= values[i]) {

                num -= values[i];

                result+=numerals[i];

            }

        }

        return result;

    }

};