Inheritance

[mmiller03]

I am just lost on trying to fix this code. I changed everything i thought possible but i still get an error saying UndergradStudent has not been declared and expected identifer before public and expeceted unqulified id before public.

#ifndef Student_H
#define Student_H
#ifndef UndergradStudent_H
#define UndergradStudent_H

#include <iostream>
using namespace std;

class Student
{
protected:
int ID;
float mathScore;
float chemScore;
public:
Student (int = 0, float = 0.0f, float = 0.0f);
void getGPA();
};

Student::Student (int id, float ms, float cs)
{
ID = id;
mathScore = ms;
chemScore = cs;
}

void Student::getGPA ()
{
float gpa = (mathScore + chemScore)/2.0;
cout << "ID = " << ID << " PGA = " << gpa << endl;
#endif
}
class UndergradStudent::public Student
{
protected:
float engScore;
float bioScore;
public:
Student(int id = 0, float = 0.0f, float = 0.0f) : Student(id), mathScore(ms), chemScore(cs) {}
void getGPA();
};

void UndergradStudent::getGPA ()
{
float gpa = (mathScore + chemScore + engScore + bioScore)/4.0;
cout << "ID = " << ID << " PGA = " << gpa << endl;
}
#endif
int main()
{
Student student = Student(777,70.5,99.8);
UndergradStudent undergradStudent = UndergradStudent(999,80,55.6,70,44.9);

student.getGPA();
undergradStudent.getGPA();

return 0;
}

[mmiller03]

--- Given a parent class below (Student), derive a child class (UndergradStudent).
The UndergradStudent should have two new members: float engScore, float bioScore.
The UndergradStudent should overwrite getGPA() to take into consideration of two new members.
--- In the main function, create one object of Student and another object of UndergradStudent and
let the two objects to call their own getGPA().

that is the question

[Aceix]

class UndergradStudent::public Student{

the colon should be one not two.

Aceix.

[mmiller03]

I changed that and I get all of these errors

39:9: error: expected unqualified-id before 'int'
39:9: error: expected ')' before 'int'
In function 'int main()':
52:74: error: no matching function for call to 'UndergradStudent::UndergradStudent(int, int, double, int, double)'
52:74: note: candidates are:
33:8: note: UndergradStudent::UndergradStudent()
33:8: note: candidate expects 0 arguments, 5 provided
33:8: note: constexpr UndergradStudent::UndergradStudent(const UndergradStudent&)
33:8: note: candidate expects 1 argument, 5 provided
33:8: note: constexpr UndergradStudent::UndergradStudent(UndergradStudent&&)
33:8: note: candidate expects 1 argument, 5 provided

#ifndef Student_H
 #define Student_H
 #ifndef UndergradStudent_H
 #define UndergradStudent_H 

#include <iostream>
 using namespace std;

 class Student
 {
 protected:
 int ID;
 float mathScore;
 float chemScore;
 public:
 Student (int = 0, float = 0.0f, float = 0.0f);
 void getGPA();
 };

 Student::Student (int id, float ms, float cs)
 {
 ID = id;
 mathScore = ms;
 chemScore = cs;
 }

 void Student::getGPA ()
 {
 float gpa = (mathScore + chemScore)/2.0;
 cout << "ID = " << ID << " PGA = " << gpa << endl;
 #endif 
}
 class UndergradStudent::public Student
 {
 protected:
 float engScore;
 float bioScore;
 public: 
Student(int id = 0, float = 0.0f, float = 0.0f) : Student(id), mathScore(ms), chemScore(cs) {}
 void getGPA();
 };

 void UndergradStudent::getGPA ()
 {
 float gpa = (mathScore + chemScore + engScore + bioScore)/4.0;
 cout << "ID = " << ID << " PGA = " << gpa << endl; 
}
 #endif
 int main()
 {
 Student student = Student(777,70.5,99.8);
 UndergradStudent undergradStudent = UndergradStudent(999,80,55.6,70,44.9);

 student.getGPA();
 undergradStudent.getGPA();

 return 0;
 } 

[Aceix]

i dont get what youre trying to do on line 39.

[z05DSL3A]

try something more like:

#include <iostream>
using namespace std;

/*****************************************************************************/
class Student
{
protected:
    int ID;
    float mathScore;
    float chemScore;
public:
    Student(int = 0, float = 0.0f, float = 0.0f);
    void getGPA();
};

Student::Student(int id, float ms, float cs)
{
    ID = id;
    mathScore = ms;
    chemScore = cs;
}

void Student::getGPA()
{
    float gpa = (mathScore + chemScore) / 2.0;
    cout << "ID = " << ID << " PGA = " << gpa << endl;

}
/*****************************************************************************/
class UndergradStudent : public Student
{
protected:
    float engScore;
    float bioScore;
public:
    UndergradStudent(int id = 0, float ms = 0.0f, float cs = 0.0f, float es = 0.0f, float bs = 0.0f) 
        : Student(id, ms, cs), engScore(es), bioScore(bs){}
    void getGPA();
};

void UndergradStudent::getGPA()
{
    float gpa = (mathScore + chemScore + engScore + bioScore) / 4.0;
    cout << "ID = " << ID << " PGA = " << gpa << endl;
}
/*****************************************************************************/
int main()
{
    Student student = Student(777, 70.5, 99.8);
    UndergradStudent undergradStudent = UndergradStudent(999, 80, 55.6, 70, 44.9);

    student.getGPA();
    undergradStudent.getGPA();

    return 0;
}

[mmiller03]

thank you so much for helping!