LeetCode #434 - Number of Segments in a String

题目描述：

Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters.

Please note that the string does not contain any non-printable characters.

Example:

Input: "Hello, my name is John"
Output: 5

统计每段开头就可以，判断每段开头只需要当前字符不是空格而前一个字符是空格即可。

class Solution {
public:
    int countSegments(string s) {
        int count=0;
        for(int i=0;i<s.size();i++)
            if(s[i]!=' '&&(i==0||s[i-1]==' ')) count++;
        return count;
    }
};