Check if All A’s Appears Before All B’s

<-E 2124> Check if All A’s Appears Before All B’s

class Solution {
public:
    bool checkString(string s) {
        int i = 0;
        for(; i != s.size(); i++) {
            if(s[i] == 'b')
                break;
        }
        if(find(s.begin() + i, s.end(), 'a') != s.end())
            return false;
        return true;
    }
};