Leetcode 434 Number of Segments in a String

Leetcode 434 Number of Segments in a String

#include <string>
using namespace std;

class Solution {
public:
    int countSegments(string s) {
        if (s.length() == 0)
            return 0;
        int begin = 0;
        int eleCount = 0;
        for (int i = 0; i < s.length(); i++){
            if (s[i] != ' '){
                begin = i;
                eleCount = 1;
                break;
            }
        }

        for (int i = begin; i < s.length() - 1; i++){
            if (s[i] == ' ' && s[i+1] != ' ')
                eleCount++;
        }
        return eleCount;
    }
};


//写一个更快些的
class Solution {
public:
    int countSegments(string s) {
        if (s.empty())
            return 0;
        int eleCount = 0;
        int i = 0;
        int length = s.length();
        while (i < length){
            if (!isspace(s[i])){//如果不是空格
                eleCount++;
                while (i < length &&!isspace(s[i]))
                    i++;
            }
            else
                i++;
        }
        return eleCount;
    }
};