Question

--C++--
--spc16-7.cpp--

// Chapter 16, Programming Challenge 7: TestScores class
#include <iostream>
#include "TestScores.h"
#include "NegativeScore.h"
using namespace std;

int main()
{
// Constant for the number of test scores
const int NUM_SCORES = 5;
  
   try
   {
       // Create an array of valid scores.
       int myScores[NUM_SCORES] = { 88, 90, 93, 87, 99 };

       // Create a TestScores object.
       //TestScores myTestScores(myScores, NUM_SCORES); // optional constructor
       TestScores myTestScores(myScores);

       // Display the average.
       cout << "The average score is ";
       cout << myTestScores.getAverage() << endl;

       // Create an array with an invalid score.
       int badScores[NUM_SCORES] = { 88, 90, -99, 87, 99 };

       // Create a TestScores object.
       //TestScores badTestScores(badScores, NUM_SCORES); // optional constructor
TestScores badTestScores(badScores);

       // Display the average.
       cout << "The average score is ";
       cout << badTestScores.getAverage() << endl;
   }
   catch(NegativeScore e)
   {
       cout << "An invalid score was found. The "
           << "invalid score is ";
// display invalid score from exception
   }

   return 0;
}


--NegativeScore.h--

// version 2
#ifndef NEGATIVE_SCORE_H
#define NEGATIVE_SCORE_H

class NegativeScore
{
private:
   // Variable to hold the bad score
z
public:
   // Constructor

   // getScore function

};

#endif



--TestScores.h--

// version 2
#ifndef TEST_SCORES_H
#define TEST_SCORES_H
#include <iostream>
#include "NegativeScore.h"
using namespace std;

// Constant for the number of test scores (used with 1 parameter version)
const int NUM_SCORES = 5;

class TestScores
{
private:
   // Pointer to array of scores
   // Number of scores (optional - used with 2 parameter version)

public:
   // Default constructor
// Initialize variable to NULL

   // Constructor (1 parameter)
   // Allocate memory for the array.
   // Copy the array (throw an error on negative value).
  
  
// Optional Constructor (2 parameters)
   // Assign number of scores from parameter.
   // Allocate memory for the array.
   // Copy the array (throw an error on negative value).

   // getAverage function

  
// Destructor
// Delete pointer
  
};

#endif

Answer 1

Here is the code for the above assignment.

Feel free to comment on any doubt and give thumbs up!

Code for NegativeScore.h

#ifndef NEGATIVE_SCORE_H

#define NEGATIVE_SCORE_H

class NegativeScore

{

private:

// Variable to hold the bad score

int score;

public:

// Constructor

NegativeScore(int score)

{

this->score = score;

}

// getScore function

int getScore()

{

return score;

}

};

#endif

Code for TestScores.h

#ifndef TEST_SCORES_H

#define TEST_SCORES_H

#include <iostream>

#include "NegativeScore.h"

using namespace std;

// Constant for the number of test scores (used with 1 parameter version)

const int NUM_SCORES = 5;

class TestScores

{

private:

// Pointer to array of scores

int *arrayOfScore;

// Number of scores (optional - used with 2 parameter version)

int numberOfScores;

public:

// Default constructor

// Initialize variable to NULL

TestScores()

{

arrayOfScore = NULL;

numberOfScores = 0;

}

// Constructor (1 parameter)

// Allocate memory for the array.

// Copy the array (throw an error on negative value).

TestScores(int myScores[])

{

numberOfScores = NUM_SCORES;

arrayOfScore = new int[NUM_SCORES];

for(int i = 0 ; i < NUM_SCORES ; ++i)

{

if(myScores[i] < 0){

throw NegativeScore(myScores[i]);

}

arrayOfScore[i] = myScores[i];

}

}

// Optional Constructor (2 parameters)

// Assign number of scores from parameter.

// Allocate memory for the array.

// Copy the array (throw an error on negative value).

TestScores(int myScores[] , int size)

{

numberOfScores = size;

arrayOfScore = new int[size];

for(int i = 0 ; i < numberOfScores ; ++i)

{

if(myScores[i] < 0){

throw myScores[i];

}

arrayOfScore[i] = myScores[i];

}

}

// getAverage function

double getAverage()

{

double sum = 0.0;

for(int i = 0 ; i < numberOfScores ; ++i)

{

sum += arrayOfScore[i];

}

return sum/numberOfScores;

}

// Destructor

// Delete pointer

~TestScores()

{

delete[] arrayOfScore;

}

};

#endif

Code for Main.cpp (which contains the main method)

#include <iostream>

#include "TestScores.h"

#include "NegativeScore.h"

using namespace std;

int main()

{

// Constant for the number of test scores

const int NUM_SCORES = 5;

try

{

// Create an array of valid scores.

int myScores[NUM_SCORES] = {88, 90, 93, 87, 99};

// Create a TestScores object.

//TestScores myTestScores(myScores, NUM_SCORES); // optional constructor

TestScores myTestScores(myScores);

// Display the average.

cout << "The average score is ";

cout << myTestScores.getAverage() << endl;

// Create an array with an invalid score.

int badScores[NUM_SCORES] = {88, 90, -99, 87, 99};

// Create a TestScores object.

//TestScores badTestScores(badScores, NUM_SCORES); // optional constructor

TestScores badTestScores(badScores);

// Display the average.

cout << "The average score is ";

cout << badTestScores.getAverage() << endl;

}

catch (NegativeScore e)

{

cout << "An invalid score was found. The "

<< "invalid score is ";

// display invalid score from exception

cout << e.getScore() << endl;

}

return 0;

}

Screenshot of test run

Thank You!