OOP C++ Assignment Help | Together C & C++ | Page 1

idle quartz Nov 13, 2024, 2:19 PM

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Hi guys I got my first object orientated programming assignment for c++ it is just generating 3 reports for grades in a console application. I'm just wondering can anyone help explain a few things. My lecturer just gives us a4 sheets and tells us to copy em without explaining any of it. Thank you in advance for any help!!

polar mulchBOT Nov 13, 2024, 2:19 PM

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onyx perch Nov 13, 2024, 2:33 PM

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We can’t help you with the entire assignment but if you explain the specific problems you’re having trouble with, it’s much easier to help

gaunt sand Nov 13, 2024, 3:29 PM

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idle quartz Hi guys I got my first object orientated programming assignment for c++ it is j...

What do you have so far?

idle quartz Nov 13, 2024, 3:30 PM

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I can tell ye when I get home if that's okay! I am currently on the train and my laptop is dead

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It's very basic stuff. Just struggling to understand certain parts. I don't have a programming brain yet

torn dune Nov 13, 2024, 4:44 PM

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Bump

idle quartz Nov 13, 2024, 5:37 PM

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I have arrived home, I am going to post the whole code, and a variation that I was trying

polar mulchBOT Nov 13, 2024, 5:44 PM

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How to Format Code on Discord

Markup

```cpp
int main() {}
```

Result

int main() {}

idle quartz Nov 13, 2024, 5:45 PM

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#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

const int numStudents = 6;
const int numSubjects = 6;

class Validation{
public:
   static bool verifyMark(int mark)
    {
    return mark >0 && mark <= 100;
    }
};

class Exam {
private:
    string students[numStudents] = {"Evan Ferguson", "Chiede Ogbene", "Adam Idah", "Megan Connolly", "Katie McCabe", "Robbie Brady"};
    string subjects[numSubjects] = {"OOP", "PPD", "Maths for IT", "Networks", "Game Design", "Mobile Tech"};

    int marks[numStudents][numSubjects] = {
        {50, 50, 50, 50, 50, 50},
        {60, 80, 75, 50, 60, 75},
        {80, 55, 65, 59, 70, 70},
        {60, 68, 75, 50, 60, 55},
        {60, 70, 70, 67, 70, 70},
        {90, 90, 90, 90, 90, 90}
    };
    string grades[numStudents][numSubjects];
    double caoPoints[numStudents][numSubjects];

public:
    ///Method to get Grade from Mark
    void get_grade(){
    for (int i =0; i<numStudents; ++i)
    {
        for (int j =0; j < numSubjects; ++j)
            {
            int mark = marks[i][j];

            ///Verify mark and assign Grades
            if(Validation::verifyMark(mark))
            {
                if (mark <50) grades[i][j] = "U";
                else if (mark < 65) grades[i][j] = "P";
                else if (mark < 80) grades [i][j] = "M";
                else grades[i][j] = "D";

            }
            else
        {
                grades[i][j] = "Invalid";
        }

    }
    }
    }
    ///Method to Calculate CAO Points from Grade
    void get_CAO_points(){
    for (int i = 0; i < numStudents; i++){
    for(int j =0; j <numSubjects; ++j)
        {
        string grade = grades[i][j];

        if (grade == "U") caoPoints[i][j] = 0.0;
        else if (grade == "P") caoPoints[i][j] = 16.67;
        else if (grade == "M") caoPoints[i][j] = 33.33;
        else if (grade == "D") caoPoints[i][j] = 50.0;

        }
    }
}

void print_report1_header(){
    cout <<"Rathmines College\nQQi Level 5 Marks%   CCP1 May 2024\n";
    cout << "Student name              OOP    PPD   MATHS    Networks  Games   Mobile Average\n";
    for(int i = 0; i <numStudents; i++){
        cout << setw(20) << students[i];
        double studentTotal = 0; /// Store the total for the student
        for (int j =0; j < numSubjects; ++j){
            cout <<setw(8) << marks [i][j];
            studentTotal += marks[i][j]; ///Add mark to total
            }
            double average = studentTotal / numSubjects; ///Get the Average
            cout << setw(10) << fixed << setprecision(2) << average << "\n"; ///Display Average
    }
}
    void display_best_student(){
    double highestAverage = 0.0;
    string bestStudent;

    for(int i = 0; i < numStudents; i++)
        {
        double studentTotal = 0.0;
        for(int j = 0; j< numSubjects; j++)
        {
            studentTotal += marks[i][j];
        }
        double average = studentTotal / numSubjects;
        if (average > highestAverage)
        {
            highestAverage = average;
            bestStudent = students[i];
        }
        string hAverage = to_string(highestAverage);
        cout<< "Best student: "<< bestStudent<< "Highest average: "<<hAverage;

    }

    cout << "End of Report 1\n\n";
    }







};

int main()
{
    System ("COLOR 80")
  Exam exam;
  exam.get_grade();
  exam.get_CAO_points();
  exam.print_report1_header();
  exam.display_best_student();
  return 0;
}

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This is the iteration of code I made from my own learning

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#include <iostream>
#include <iomanip>
#include <stdlib.h>

using namespace std;

class Exams
{
public:
    string get_grade(float mark);
    void print_report1();
private:
    string dm_grade;
    string dm_sub_name[4] = {"English", "Maths", "Spanish", "Music"};
    float dm_mark;
};

void Exams::print_report1()
{
    cout<<setw(30)<< "Rathmine College" <<endl;
    cout<<setw(30)<< "QQI Leve 5 Marks%" <<endl;

    cout<<setw(8)<< "Modules ";
    for(int c = 0; c<4; c++)
    {
        cout<<left<<setw(10)<< dm_sub_name[c];

    }
    cout<<left<<setw(10)<<"Average ";
    cout<< endl;
}
    string Exams::get_grade(float mark)
    {
        dm_mark = mark;
        if(dm_mark <=50)
        {
            dm_grade = "U";
        }
                if(dm_mark >=50 && dm_mark <65)
        {
            dm_grade = "P";
        }
                if(dm_mark >=65 && dm_mark <80)
        {
            dm_grade = "M";
        }
                if(dm_mark >=80)
        {
            dm_grade = "D";
        }
        return dm_grade;
    }

    int data[4][4] = {50,50,50,50,
                      50,50,60,80,
                      75,60,60,75,
                      50,50,50,50};

                      string student_name[4] = {"G Best", "R Burton", "K Harris", "K Starmer"};

                      main()
                      {
                          system("COLOR 84");
                          class Exams student[4];
                          for(int a=0;a<65;a++)
                          {
                              cout <<"_";
                          }
                          cout<< endl;
                          class Exams reports;
                          reports.print_report1();

                          for(int i=0;i<4;i++)
                          {
                              cout<<setw(15)<< student_name[i];
                              for(int j=0;j<4;j++)
                              {
                                  cout<<setw(10)<<reports.get_grade(data[i][j]);
                              }
                              cout<< endl;
                          }
                          return 0;
                      }

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That is the a4 sheet he gave me for the generation of the table. I had to finish the code to display the table myself casue he conveniently fogot to put it in there

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What I am wondering is in the first piece of code, I cannot for the life of me get to_string() function to work and display the best student and highest average

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I am thinking about removing the method for displaying the best student and just putting it in without a method call

onyx perch Nov 13, 2024, 6:08 PM

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The to_string works

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The problem is that it's printing the best student multiple times because you put this part of the code inside the outer for loop

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If you want to get rid of the trailing zeros you can do

    string hAverage = to_string(highestAverage);
    hAverage.erase ( hAverage.find_last_not_of('0') + 1, std::string::npos );
    hAverage.erase ( hAverage.find_last_not_of('.') + 1, std::string::npos );

idle quartz Nov 13, 2024, 6:18 PM

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Ohhhhhhh

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Okay

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So it needs to be moved

onyx perch Nov 13, 2024, 6:19 PM

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You can also just print the highestAverage without converting it to string which would be the fastest and simplest method

idle quartz Nov 13, 2024, 6:20 PM

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I know, but the lecturer said to specifically use it for some dumbass reason

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To see we can use it I guess

onyx perch Nov 13, 2024, 6:21 PM

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There are lots of opportunities where converting between data types would be useful and he/she gave you a really pointless one lol

idle quartz Nov 13, 2024, 6:22 PM

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He's 64 and never actually worked in dev just taught

onyx perch Nov 13, 2024, 6:22 PM

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😦

idle quartz Nov 13, 2024, 6:22 PM

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yuuuuup

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gonna be relearning everything after this hahahaha

onyx perch Nov 13, 2024, 6:23 PM

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might be for the best

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any other places you're confused about?

idle quartz Nov 13, 2024, 6:24 PM

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I am getting this errpr after moviing it out of the loop. If I just put it in main() would it work

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which of the methods for get_grade is more efficient

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all those ifs, or elseifs

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okay moved it again and have a new error for cout

onyx perch Nov 13, 2024, 6:27 PM

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Are you using something older than C++11?

idle quartz Nov 13, 2024, 6:28 PM

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Possibly? This guy got us to install this off a usb. Where can I check in my compiler

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I am using codeblocks and the build I have is from 2017

onyx perch Nov 13, 2024, 6:30 PM

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Go to Toolbar -> Settings -> Compiler

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CodeBlocks is outdated, it’s sad they’re making you use it

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btw

idle quartz Nov 13, 2024, 6:31 PM

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that sucks

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Still cannot find this version, sorry if I am being annoying hahahah

onyx perch Nov 13, 2024, 6:32 PM

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It’s all good

idle quartz Nov 13, 2024, 6:33 PM

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#

onyx perch Nov 13, 2024, 6:34 PM

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I would do the check for 14 tbh unless your teacher said something else specifically

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After checking it and clicking ok, try running your code again

idle quartz Nov 13, 2024, 6:36 PM

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Will do and he did not say anything about that in compiler

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so its saying cout error now

onyx perch Nov 13, 2024, 6:39 PM

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You can’t return something in a void function and especially you can’t return two different things in the way you did no matter what type of function

idle quartz Nov 13, 2024, 6:40 PM

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Its working!!!!

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ANd ye I forgot it was void

onyx perch Nov 13, 2024, 6:40 PM

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Nice!

idle quartz Nov 13, 2024, 6:41 PM

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Such a small thing to get working, but such joy hahahah

onyx perch Nov 13, 2024, 6:41 PM

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idle quartz which of the methods for get_grade is more efficient

For this, if you only use if statements then when any of them are true the code inside will be run. If you use if and else if statements only one of them will run

idle quartz Nov 13, 2024, 6:41 PM

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Oh okay okay

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so Elseif in my mind is better for this then

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and honestly looks cleaner

onyx perch Nov 13, 2024, 6:42 PM

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I’ll have to look more closely at your code but probably

onyx perch Nov 13, 2024, 6:50 PM

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onyx perch For this, if you only use if statements then when any of them are true the code ...

Here's an example of this

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#include <iostream>
#include <string>

int main(){
    
    std::cout << "only if" << "\n";
    int b = 2;
    if(b == 2) std::cout << 'a' << "\n";
    if(b == 2) std::cout << 'b' << "\n";
    if(b < 10) std::cout << 'c' << "\n";
    
    std::cout << "\n";
    std::cout << "if, else if, else" << "\n";
    int a = 1; 
    if(a == 1) std::cout << 'a' << "\n";
    else if(a == 1) std::cout << 'b' << "\n";
    else if (a < 10) std::cout << 'c' << "\n";
    else{
        std:: cout << 'd' << "\n";
    }
}

onyx perch Nov 13, 2024, 6:50 PM

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onyx perch ```cpp #include <iostream> #include <string> int main(){ std::cout << ...

;compile

bitter moatBOT Nov 13, 2024, 6:51 PM

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Program Output

only if
a
b
c

if, else if, else
a

idle quartz Nov 13, 2024, 6:52 PM

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I understand

idle quartz Nov 13, 2024, 9:38 PM

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okay I have another question for this

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basically

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I need to calculate the total CAO points and display them under that heading. I am not sure should I just add a full mehod to calculate CAO points

onyx perch Nov 13, 2024, 9:46 PM

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Didn’t you already have CAO method inside your class?

idle quartz Nov 13, 2024, 9:54 PM

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All good

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figured it out

polar mulchBOT Nov 13, 2024, 9:59 PM

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@idle quartz Has your question been resolved? If so, type !solved :)

idle quartz Nov 13, 2024, 10:00 PM

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Thanks for the help nou!

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!solved

polar mulchBOT Nov 13, 2024, 10:02 PM

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Thank you and let us know if you have any more questions!

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#OOP C++ Assignment Help