如何检查向量中是否存在元素？

Question

这在Visual C++ 2010 Express上编译并运行正常,但它只检查[2]元素:"Fish".

int main()
    {
        vector<string> words;
        string temp;
        vector<string> disliked(3);
        disliked[0] = "Broccoli";
        disliked[1] = "Mushrooms";
        disliked[2] = "Fish";
        while (cin >> temp)
            words.push_back(temp);
        cout << "Number of words: " << words.size() << endl;
        for (int i=0; i<words.size(); ++i) {
            if (words[i]!=disliked[2])
                cout << words[i] << " ";
            else cout << "BLEEP" << " ";
        }
        cout << endl;
        keep_window_open();
        return 0;
    }

如何在不键入的情况下检查所有向量元素:

if (words[i]!=disliked[0] && words[i]!=disliked[1] && words[i]!=disliked[2])

？有关如何使其更好或更优雅的任何其他建议？

Answer 1

if (std::find(disliked.begin(), disliked.end(), words[i]) == disliked.end()) {
   cout << words[i] << " ";
} else {
   cout << "BLEEP" << " ";
}

如果std::vector<string> disliked(3);用std::set<string> disliked;它替换它会更快.

std::set<string> disliked;
disliked.insert("Broccoli");
disliked.insert("Mushrooms");
disliked.insert("Fish");
//....

if (disliked.find(words[i]) == disliked.end()) {
   cout << words[i] << " ";
} else {
   cout << "BLEEP" << " ";
}