【leetcode】Integer to Roman

最近使用开发的过程中出现了一个小问题，顺便记录一下原因和方法--

    Question ： 

    Given an integer, convert it to a roman numeral.

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

    Anwser 1 ：    

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

    Anwser 2 ：   

每日一道理
古人云：“海纳百川，有容乃大。”人世间，不可能没有矛盾和争吵，我们要以磊落的胸怀和宽容的微笑去面对它 。哈伯德也曾说过：“宽恕和受宽恕的难以言喻的快乐，是连神明都会为之羡慕的极大乐事。”让我们从宽容中享受快乐，从谅解中体会幸福吧！

class Solution {
public:string intToRoman(int num) {// Start typing your C/C++ solution below// DO NOT write int main() function    char symbol[7] = {'I', 'V', 'X', 'L', 'C', 'D', 'M'};string res = "";int scale = 1000;for (int i = 6; i >= 0; i -= 2){int digit = num / scale;num2roman(digit, res, symbol + i);num %= scale;scale /= 10;}return res;}void num2roman(int num, string& res, char symbols[]){if (num == 0)return;if (num <= 3)res.append(num, symbols[0]);else if (num == 4){res.append(1, symbols[0]);res.append(1, symbols[1]);}else if (num <= 8){res.append(1, symbols[1]);res.append(num - 5, symbols[0]);}else{res.append(1, symbols[0]);res.append(1, symbols[2]);}}
};

文章结束给大家分享下程序员的一些笑话语录： 一位程序员去海边游泳，由于水性不佳，游不回岸了，于是他挥着手臂，大声求.救：“F1，F1！”