我一直在尝试使用二进制搜索树来读取传入的数据，但无法运行。请有人帮我查一下，或者给我正确的代码。

bstList bl = null;
        letterFile lf;
        String city;
        String country;
        time sunrise;
        time sunset;

        lfstream File("Data.txt");
        int count = 0;
        String skipline;
        if(File.isOpen()) {
            while(lfile.eof()){
                if(count == 0) {
                    String temp = null;
                    getline(File,temp);
                    count = 1;
                    //for testing only
                }
                else
                {
                    getline(File, city, ',');
                    getline(File, country, ',');
                    getline(File, sunrise, ',');
                    getline(File, sunset, ' ');
                    /* String letter;
                    File >> letter;
                    */

                    bl.add(city, country, sunrise, sunset){
                    // create new node
                    //NumberList::ListNode* node = new NumberList::ListNode(city, country)

                }
                }

            File.close();