Need help with inheritance

[flash]

I need to complete derived class and main class:
derived class should have data member: major(string), grades: an array of integrs (size 5).
it should have methods to:
1-set and get the major.
2-insert a grade in the grades array.
3-compute the gpa of the 5 courses.
THEN:
MAIN METHOD THAT :
1-Creat a diploma student.
2-et the name of the student to a value that program gets from the user.
3-sets itt gender and age after getting them from the user.
4-sets the major a value that the user gets interactive.
5-sets 5 grades to value that user inters interactively.
6-displays the name of students his gender,his age and major.
7-computes the GPA of this student.
creates a second diploma student whoes name sami and age 21,his major math ,he has the same grade s as the fist student.Use message passing to assign grades to the second student.
8-Display the grades of the first student and second student in a form of table of two rows.

=============== =============== ==========
#include <iostream>
using namespace std;

class student
{
protected:
int id;
string name;
char gender;
int age;
public :

student (){name=" ";gender=' ';age=0;id=0;}
void setid(int s){id=s;}
void setName(string n){name=n;}
void setGender(char m){gender=m;}
void setAge(int g){age=g;}
int getid(){return id;}
string getName(){retur n name;}
char getGender(){ret urn gender;}
int getAge(){return age;}

};

class dpstudent : public student{
protected:
string major;
int grade[5];

public:
dpstudent(){ for(int i=0;i<5;i++)gra de[i]=0;major=' ';}
void setmajor(string j){major=j;}
void setGrade(int ag[]){ for(int i=0;i<5;i++) grade[i]=ag[i];}
int getGrade(int i){return grade[i];}
string getmajor(){retu rn major;}
int computegpa(){in t m=0;int gpa=0;
for(int i=0;i<5;i++) m=m+grade[i];
gpa=m/5;
return gpa;}
};
int main(){
int grade[5];
string name;
char m;
int age;
string major;
dpstudent f;
cout<<"enter the name of frist student"<<endl;
cin>>name;
f.setName("name ");
cout<<"enter the gender"<<endl;
cin>>m;
f.setGender('m' );
cout<<"enter the age"<<endl;
cin>>age;
f.setAge(age);
cout<<"enter the major"<<endl;
cin>>major;
f.setmajor("maj or");
for(int i=0;i<5;i++){
cout<<"enter the grade: ";
cin>>grade[i];
}
for( i=0;i<5;i++)
cout<<grade[i]<<endl;
cout<<"the gpa of the 5 courses is"<<f.computeg pa()<<endl;
return 0;
}

[horace1]

not sure what your problem is as you did not say

however, noticed a couple of things in the last few lines of your program - you did not define i in the for() and you did not call setGrade() to set up the grade array ready for computegpa(). See lines marks // ** in the code below

for(int i=0;i<5;i++)   //** added int
cout<<grade[i]<<endl;

f.setGrade(grade);     // ** added line
cout<<"the gpa of the 5 courses is"<<f.computegpa()<<endl;
return 0;
}

[flash]

not sure what your problem is as you did not say

however, noticed a couple of things in the last few lines of your program - you did not define i in the for() and you did not call setGrade() to set up the grade array ready for computegpa(). See lines marks // ** in the code below

for(int i=0;i<5;i++)   //** added int
cout<<grade[i]<<endl;

f.setGrade(grade);     // ** added line
cout<<"the gpa of the 5 courses is"<<f.computegpa()<<endl;
return 0;
}

Thanks
could u try this program in microsoft visual c++ 6.0 (1998).
it is not working well.

[horace1]

Thanks
could u try this program in microsoft visual c++ 6.0 (1998).
it is not working well.

I don't have Visual C - I ran the program using DEV-C++, Cygwin g++ and Borland CBuilder 5 OK


this is a run (input in bold)
enter the name of frist student sam
enter the gender m
enter the age 23
enter the major maths
enter the grade: 30
enter the grade: 40
enter the grade: 50
enter the grade: 60
enter the grade: 70
30
40
50
60
70
the gpa of the 5 courses is50

what happens when you run the program?
what data are you using? - note that the name must be one word, i.e. Sam not Sam Jones.

and here is the complete code

#include <iostream>
using namespace std;

class student
{
protected:
int id;
string name;
char gender;
int age;
public :

student (){name=" ";gender=' ';age=0;id=0;}
void setid(int s){id=s;}
void setName(string n){name=n;}
void setGender(char m){gender=m;}
void setAge(int g){age=g;}
int getid(){return id;}
string getName(){return name;}
char getGender(){return gender;}
int getAge(){return age;}

};

class dpstudent : public student{
protected:
string major;
int grade[5];

public:
dpstudent(){ for(int i=0;i<5;i++)grade[i]=0;major=' ';}
void setmajor(string j){major=j;}
void setGrade(int ag[]){ for(int i=0;i<5;i++) grade[i]=ag[i];}
int getGrade(int i){return grade[i];}
string getmajor(){return major;}
int computegpa(){int m=0;int gpa=0;
for(int i=0;i<5;i++) m=m+grade[i];
gpa=m/5;
return gpa;}
};
int main(){
int grade[5];
string name;
char m;
int age;
string major;
dpstudent f;
cout<<"enter the name of frist student"<<endl;
cin>>name;
f.setName("name");
cout<<"enter the gender"<<endl;
cin>>m;
f.setGender('m');
cout<<"enter the age"<<endl;
cin>>age;
f.setAge(age);
cout<<"enter the major"<<endl;
cin>>major;
f.setmajor("major");
for(int i=0;i<5;i++){
cout<<"enter the grade: ";
cin>>grade[i];
}
for(int i=0;i<5;i++)   //** added int
cout<<grade[i]<<endl;

f.setGrade(grade);     // ** added
cout<<"the gpa of the 5 courses is"<<f.computegpa()<<endl;
return 0;
}

[flash]

I don't have Visual C - I ran the program using DEV-C++, Cygwin g++ and Borland CBuilder 5 OK


this is a run (input in bold)
enter the name of frist student sam
enter the gender m
enter the age 23
enter the major maths
enter the grade: 30
enter the grade: 40
enter the grade: 50
enter the grade: 60
enter the grade: 70
30
40
50
60
70
the gpa of the 5 courses is50

what happens when you run the program?
what data are you using? - note that the name must be one word, i.e. Sam not Sam Jones.

and here is the complete code

#include <iostream>
using namespace std;

class student
{
protected:
int id;
string name;
char gender;
int age;
public :

student (){name=" ";gender=' ';age=0;id=0;}
void setid(int s){id=s;}
void setName(string n){name=n;}
void setGender(char m){gender=m;}
void setAge(int g){age=g;}
int getid(){return id;}
string getName(){return name;}
char getGender(){return gender;}
int getAge(){return age;}

};

class dpstudent : public student{
protected:
string major;
int grade[5];

public:
dpstudent(){ for(int i=0;i<5;i++)grade[i]=0;major=' ';}
void setmajor(string j){major=j;}
void setGrade(int ag[]){ for(int i=0;i<5;i++) grade[i]=ag[i];}
int getGrade(int i){return grade[i];}
string getmajor(){return major;}
int computegpa(){int m=0;int gpa=0;
for(int i=0;i<5;i++) m=m+grade[i];
gpa=m/5;
return gpa;}
};
int main(){
int grade[5];
string name;
char m;
int age;
string major;
dpstudent f;
cout<<"enter the name of frist student"<<endl;
cin>>name;
f.setName("name");
cout<<"enter the gender"<<endl;
cin>>m;
f.setGender('m');
cout<<"enter the age"<<endl;
cin>>age;
f.setAge(age);
cout<<"enter the major"<<endl;
cin>>major;
f.setmajor("major");
for(int i=0;i<5;i++){
cout<<"enter the grade: ";
cin>>grade[i];
}
for(int i=0;i<5;i++)   //** added int
cout<<grade[i]<<endl;

f.setGrade(grade);     // ** added
cout<<"the gpa of the 5 courses is"<<f.computegpa()<<endl;
return 0;
}

AFTER LINKING (MICROSOFT VISUAL C++):
Compiling...
asss.cpp
c:\documents and settings\m8au\d esktop\assssss\ asss.cpp(50) : error C2679: binary '>>' : no operator defined which takes a right-hand operand of type 'class std::basic_stri ng<char,struct std::char_trait s<char>,class std::allocator< char> >' (or there
is no acceptable conversion)
c:\documents and settings\m8au\d esktop\assssss\ asss.cpp(59) : error C2679: binary '>>' : no operator defined which takes a right-hand operand of type 'class std::basic_stri ng<char,struct std::char_trait s<char>,class std::allocator< char> >' (or there
is no acceptable conversion)
c:\documents and settings\m8au\d esktop\assssss\ asss.cpp(65) : error C2374: 'i' : redefinition; multiple initialization
c:\documents and settings\m8au\d esktop\assssss\ asss.cpp(61) : see declaration of 'i'
Error executing cl.exe.

asss.obj - 3 error(s), 0 warning(s)