12. Integer to Roman
我们提供的服务有：成都网站制作、成都网站建设、外贸营销网站建设、微信公众号开发、网站优化、网站认证、温宿ssl等。为数千家企事业单位解决了网站和推广的问题。提供周到的售前咨询和贴心的售后服务，是有科学管理、有技术的温宿网站制作公司
Given an integer, convert it to a roman numeral.
Input is guaranteed to be within the range from 1 to 3999.
题目大意：
将一个给定的阿拉伯数字转换成罗马数字。
思路：
这题看到的时候，想的太多。
其实很简单，将千位，百位，十位，个位都表示出来，然后组合即可。
代码如下：
class Solution {
public:
string intToRoman(int num) {
string thousands[4] = {"","M","MM","MMM"};
string hundreds[10] = {"","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"};
string tens[10] = {"","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"};
string units[10] = {"","I","II","III","IV","V","VI","VII","VIII","IX"};
string * hits[4] = {units,tens,hundreds,thousands};
string result;
int index = 0;
while (num > 0)
{
result = hits[index][num % 10] + result;
num = num / 10;
index++;
}
return result;
}
};总结：
有时候题目没有那么难，不要自己搞的很复杂。问题简单化。简单化。。。
2016-08-19 15:16:29
