【字符串】434. 字符串中的单词数

 1 class Solution {
 2 public:
 3     int countSegments(string s) 
 4     {
 5         int res = 0;
 6         int flag=1;
 7         if (s.size() == 0) 
 8         {
 9             return res;
10         }
11 
12         for (int i = 0; i < s.size(); ++i)
13         {
14             if ((s[i]!=‘ ‘) && flag)
15             {
16                 res++;
17                 flag = 0;
18             }
19             if (s[i] == ‘ ‘)
20             {
21                 flag = 1;
22             }
23         }
24         return res;
25     }
26 };