<12> ——Integer to Roman

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12、 Integer to Roman

整数转罗马数字

给定一个整数,将其转换成罗马数字。

返回的结果要求在1-3999的范围内。

罗马数字

罗马数字没有0。
1~9             I,II,III,IV,V,VI,VII,VIII,IX 
I、V、X、L、C、D、M
分别表示:1,5,10,50,100,500,1000

代码:
class Solution {public:    string intToRoman(int num) {        string M[]={"","M","MM","MMM"};        string C[]={"","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"};        string X[]={"","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"};        string I[]={"","I","II","III","IV","V","VI","VII","VIII","IX"};        return M[num/1000]+C[(num%1000)/100]+X[(num%100)/10]+I[num%10];    }};