Integer to Roman
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Given an integer, convert it to a roman numeral.
Input is guaranteed to be within the range from 1 to 3999.
题意：
给一个整数，转换成罗马数字
分析：
先将整数和字符数组对应起来。
然后分割整数。
class Solution {public: string intToRoman(int num) { string str; 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}; for(int i=0;num!=0;++i) //value[i]的数值从高到低，循环条件是传入的数num不为0 { while(num>=value[i]) { num-=value[i]; str+=symbol[i];//字符串不断的相加 } } return str; }}; 0 0
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