LeetCode 12. Integer to Roman

很简单。直接打表。

emm但是似乎大部分人认真找规律写的代码...

class Solution {
public:
    string intToRoman(int num) {
        int a[4]={0};
        char s[4][10][6]={{"","I","II","III","IV","V","VI","VII","VIII","IX"},
        {"","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"},
        {"","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"},
        {"","M","MM","MMM"}};
        int i=-1;
        string ans;
        while(num>0){
            a[++i]=num%10;
            num/=10;
        }
        for (int i=3;i>=0;i--)
            ans+=string(s[i][a[i]]);
        return ans;
    }
};