题解 | 词频统计

class Frequency {
public:
    int getFrequency(vector<string> article, int n, string word) {
        // write code here
        int size = article.size();
        int count=0;
        for(int i=0; i<size; ++i){
            if(article[i] == word) count++;//string 也可以判定
        }
        return count;
    }
};