Integer to Roman 整数转换成罗马数字

class Solution {

public:

string intToRoman(int num) {

string str="";

int value[]={1000,900,500,400,100,90,50,40,10,9,5,4,1};

string symbol[]={"M","CM","D","CD","C","XC","L","XL","X","IX","V","IV","I"};

for(int i=0;i<13&&num>0;i++)

{

while(num>=value[i])

{

num-=value[i];

str+=symbol[i];

}

}

return str;

}

};