c++ - 创建哈希表

Question

我是一名 C++ 学生，我只是想学习如何创建哈希表。我有哈希编码部分，但我不知道如何将表格实现到编码部分。如果有人可以给我帮助，那就太好了。谢谢

Movies::Movies(string fn){loadMovies(fn);}

int Movies::getMovieCount() const {return movieCnt;}

 int hashcode(string title)
{
    int hash = 0; 
int factor = 0 ; 
for (int i = 0; i<title.length(); i++)
    hash = factor* title.at(i);
return hash;
}

const Movie * Movies::getMovie(string mc, int& mn) const {
if(mc.length()==0)
    return NULL; // not found
else {
    string mcP = myToLower(mc);
    int ndx=0;
    for(;ndx<movieCnt &&
        (myToLower(movies[ndx].getTitle()).find(mcP)==
        string::npos);ndx++);
    mn = ndx<movieCnt?ndx+1:0;
    return ndx<movieCnt?&movies[ndx]:NULL;
}
 }

Movies::~Movies() {
delete[] movies;
movies = NULL;
} 

void Movies::loadMovies(string fn) {
ifstream iS(fn);
string s;
getline(iS, s); // skip heading
getline(iS, s);
movieCnt=0;
movies = new Movie[MAX_MOVIES];
while(!iS.eof()) {
    movies[movieCnt++] = Movie(s);
    getline(iS, s);
}
iS.close();
reSize();
}

void Movies::reSize() {
Movie * m = movies;
movies = new Movie[movieCnt];
for(int i=0;i<movieCnt;i++)
    movies[i] = m[i];
}