> For the complete documentation index, see [llms.txt](https://dfine.gitbook.io/leetcode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dfine.gitbook.io/leetcode/434.number_of_segments_in_a_string.md).

# 434.Number of Segments in a String

**434.Number of Segments in a String**

难度:Easy

> 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
```

以空格分割，然后找出最后一个空格之后是否有单词即可。

```
class Solution {
    public:
    int countSegments(string s) {
        int res=0;
        bool ischar=false;
        if(s.empty()) return res;
        if(s.size()==1) return s[0]!=' ';

        for(int i=1;i<s.length();i++)
            if((s[i]==' ') && (s[i-1] !=' '))
            {
                res++;
                //cout<<" "<< i<< res<<" "<<s[i]<<" "<<s[i-1]<<endl;
                ischar=false;
            }
            else if(s[i]!=' ')
                ischar=true;
            
        return res+ischar;
    }
};
```

> 执行用时 :0 ms, 在所有 C++ 提交中击败了100.00%的用户\
> 内存消耗 :8.2 MB, 在所有 C++ 提交中击败了90.29%的用户


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