面试题05. 替换空格

 1 class Solution {
 2 public:
 3     string replaceSpace(string s) 
 4     {
 5         string res;
 6         for(int i = 0; i < s.size(); ++i)
 7         {
 8             if(s[i] == ‘ ‘)
 9             {
10                 res += "%20";
11             }
12             else
13             {
14                 res += s[i];
15             }
16         }
17         return res;
18     }
19 };