[LeetCode] Integer to Roman

[Problem]

Given an integer, convert it to a roman numeral.

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

[Solution]

class Solution {
public:
    string intToRoman(int num) {
        // Start typing your C/C++ solution below
        // DO NOT write int main() function
       
        //1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1
        string roman[13] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
        int integer[13] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
        string res = "";
        while(num > 0){
       
            for(int i = 0; i < 13; ++i){
                if(num >= integer[i]){
                    while(num >= integer[i]){
                        res.append(roman[i]);
                        num -= integer[i];
                    }
                    break;
                }
            }
        }
        return res;
    }
};

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