Brtdku

I am trying to do some stuff with C++ and i am new in it :)

I have tried 1 program of class that gets the student details and print the output of it.

#include <iostream>

using namespace std;



#define MAX 10



class student

{

    private:

        char  name[30];

        int   rollNo;

        int   total;

        float perc;

    public:

        //member function to get student's details

        void getDetails(void);

        //member function to print student's details

        void putDetails(void);

};



//member function definition, outside of the class

void student::getDetails(void){

    cout << "Enter name: " ;

    cin >> name;

    cout << "Enter roll number: ";

    cin >> rollNo;

    cout << "Enter total marks outof 500: ";

    cin >> total;

    perc=(float)total/500*100;

}



//member function definition, outside of the class

void student::putDetails(void) {

    cout << "Student details:n";

    cout << "Name:"<< name << ",Roll Number:" << rollNo << ",Total:" << total << ",Percentage:" << perc;

}



int main()

{

    student std[MAX];       //array of objects creation

    int n,loop;



    cout << "Enter total number of students: ";

    cin >> n;



    for(loop=0;loop< n; loop++){

        cout << "Enter details of student " << loop+1 << ":n";

        std[loop].getDetails();

    }



    cout << endl;



    for(loop=0;loop< n; loop++) {

        cout << "Details of student " << (loop+1) << ":n";

        std[loop].putDetails();

    }



    return 0;

}

Its very basic code and works fine and I am able to give inputs and print the output.

Now I want to add new Student object at runtime using Dynamic memory allocation and want to add that object in the existing array of object (So that I can get the highest, lowest marks of any student)

I know I need to use new operator for this.

But I am not sure what could be the best way to write this solution.

Any help will be highly appreciated.

Thanks!

IMO, The best way to do this using dynamic memory is by using std::unique_ptr or std::shared_ptr (it actually depends on the requirement).

Here is one example of usage of unique_ptr:

using StudentPtr = std::unique_ptr<student>;



int main() {

    std::vector<StudentPtr> studentDetails;

    int n;



    cout << "Enter the number of students: ";

    cin >> n;



    studentDetails.resize(n);



    for (auto &s: studentDetails) {

        s = StudentPtr(new student);

        s->getDetails();

    }



    return 0;

}

For getting minimum and maximum, you may use min_element and max_element provided by STL respectively.