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class Student
{
public:
Student() : name("Student"), sex('M'), age(18), num("1") {}
Student(string n, char s, int a, string no) : name(n), sex(s), age(a), num(no) {}
protected:
int age;
string name;
char sex;
string num;
};
class CollegeStudent : public Student
{
public:
CollegeStudent(string n, char s, int a, string no) : name("CollegeStudent") {}
};