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Hey guys i'm new to this forum ;so here's the thing i need help with my code. I am required to :
Add to the class EECE230Student a private static variable which is used to count the number of objects generated. For this purpose, you need to perform the following:

a.  Declare and initialize the variable and add a reader to read this variale .
b.  Modify the constructors as needed and add a destructor .
c.  Add also a copy constructor which uses a call by reference.

please guys this is really urgent.


#include <iostream>
using namespace std;

class EECE230Student  {

    int id;
    int section;
    int quiz1;
    int quiz2;
    int finalExam;
    static int count;

public:

    EECE230Student();
    EECE230Student(int id, int section);

    void set(static int counter ){
        counter = count;
    }
    void set(int iden, int sect);
    void set(int quizOne, int quizTwo, int finalTest);


    int get_id();
    int get_section();
    int get_quiz1();
    int get_quiz2();
    int get_finalExam();

    double quizAverage();
    double finalGrade();

    void displayGrade();

};

void bubble(EECE230Student a[],int size );

void print (EECE230Student a[],int size );

double classAverage (EECE230Student a[]);

int main(){

    EECE230Student ast[4];

    ast[0].set(1,1);
    ast[0].set(10,20,30);

    ast[1].set(2,1);
    ast[1].set(40,50,60);

    ast[2].set(3,1);
    ast[2].set(70,80,90);

    ast[3].set(4,1);
    ast[3].set(35,55,75);

    for(int i=0; i<4 ; i++){

        ast[i].displayGrade();

    }


    bubble(ast,4);
    print(ast,4);

    cout << "class average :" << classAverage(ast) << endl; 

    system("pause");
    return 0;
}

EECE230Student::EECE230Student(){

    quiz1=0;
    quiz2=0;
    finalExam=0;

}
EECE230Student::EECE230Student(int id, int section){
    id=0;
    section=0;
}

void EECE230Student::set(int iden, int sect){

    id=iden;
    section=sect;
}

void EECE230Student::set(int quizOne, int quizTwo, int finalTest){

    quiz1=quizOne;
    quiz2=quizTwo;
    finalExam=finalTest;
}

int EECE230Student::get_id(){

    return id;
}
int EECE230Student::get_section(){

    return section;
}
int EECE230Student::get_quiz1(){

    if(quiz1 < 0 && quiz1 > 100)

            return false;

    return quiz1;
}
int EECE230Student::get_quiz2(){

    if(quiz2 < 0 && quiz2 > 100)

            return false;

    return quiz2;
}
int EECE230Student::get_finalExam(){

    if(finalExam < 0 && finalExam > 100 )

            return false;

    return finalExam;
}
double EECE230Student::quizAverage(){

    return (quiz1+quiz2)/2.0;
}
double EECE230Student::finalGrade(){

    return (quizAverage()+finalExam)/2.0;
}

void EECE230Student::displayGrade(){

    cout << " id: " << id << " final grade : " << finalGrade() << endl;

}



void bubble(EECE230Student a[],int size ){

    for(int i=0; i<4 ;i++ ) 
        for(int j = i+1 ; j<size ; j++ ) 
            if(a[i].finalGrade() > a[j].finalGrade())
                swap(a[i],a[j]);    
}

void print (EECE230Student a[],int size)
{
    for(int k=0; k<size;k++)
        cout<< a[k].finalGrade() << "  " ;

}

double classAverage (EECE230Student a[]){
    double sum=0;
    double average;

    for(int i=0; i<4; i++ ){
        sum = sum + a[i].finalGrade();
    }

    average = sum / 4.0;

    return average;
}
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Discussion Span
Last Post by phorce
1

First of all, it's good practice to declare your class variables like this:

protected: 
    int id;
    int section;
    int quiz1;
    int quiz2;
    int finalExam;
    static int count;

There are also private and public

Second problem, in the function

void set(static int counter ){
        counter = count;
    }

You are passing through a static int, this is not allowed since you're just passing through the variable, and, have already defined your static member above. So just do:

void set(int counter ){
        counter = count;
    }

NOTE:

Shouldn't it be count = counter since I assume you are passing in counter in order to set the static variable?

However, because in one of your tasks it states that you have to count the number of objects being passed through, I do not know how this would work in your example. A more common way would be to increment the static variable inside of the constructor, like so:

class Example {

    public:
    static int var;

    Example() {
        var++;

    }


};

int Example::var = 0;

int main(int argc, char *argv[]) {

    Example e1;
    Example e2;
    Example e3;

    cout << Example::var; // 3
}

Hope this helps, anymore questions, feel free to ask

Edited by phorce

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