public static void InpC()
    {
        foreach (var s in Student.studentList)
        {
            Console.Write(s);
        }
        Console.WriteLine();
        foreach (var t in Student.gpaList)
        {
            Console.Write(t);
        }
        Console.WriteLine();
        foreach (var u in Student.hbList)
        {
            Console.Write(u);
        }
    }