通过泛型类实现输出学生信息

        class BstuInfo<T>
        {
            public T Num;
            public T Name;
            public T Sex;
            public T Age;
            public T Birthday;
            public T Salary;
        }
        class HstuInfo<T>:BstuInfo<T>
        {
            public T Chinese;
            public T Match;
            public T English;
        }