434. Number of Segments in a String

题目：

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

思路：

本题，利用c++标准库函数，其中要注意的是标点符号后面还会有空格，所以直接忽略标点符号。

代码：

class Solution {
public:
    int countSegments(string s) {
        int sum=0;
        if(s.size()==0)
            return 0;
        for(int i=0;i<s.size();i++)
        {
            if(isspace(s[i]))
                sum++;
        }
        return sum+1;
    }
};