1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence

class Solution {
public:
    int isPrefixOfWord(string sentence, string searchWord) 
    {
        int cnt = 1;
        string temp;
        for(int i=0; i<sentence.length(); i++)
        {
            if(sentence[i]==' ')
            {
                temp = "";
                cnt++;
            }
            else
            {
                temp+=sentence[i];
            }

            if(temp==searchWord)
            {
                return cnt;
            }
        }
        return -1;
    }
};