Question

Define a class in C++ called gradebook that can implement the following. The main will be calling this to pass in two different gradebooks.

class Gradebook

{

public:

// default constructor

Gradebook();

// return the size of the current vector: scores,

// which represents current gradebook

int getSize() const;

// insert a FinalGrade object, newFG,

// into the end of the current gradebook

void insert(FinalGrade newFG);

// return a FinalGrade object,

// which holds the maximum score in the current gradebook

FinalGrade getMax() const;

// return a FinalGrade object,

// which holds the minimum score in the current gradebook

FinalGrade getMin() const;

// return the average score among all scores in the current gradebook

double getAverage() const;

// For each FinalGrade object in the current gradebook,

// its score will be increased by the given value

// If the score reaches MAX_SCORE, it does not go beyond

void incrementScore(double value);

// print the FinalGrade objects in the current gradebook

void print() const;

private:

vector<FinalGrade> scores;

};

Answer 1

Since you have not provided the code for FinalGrade, I am assuming its definition and providing you the implementation.

CODE

class Gradebook

{

public:

Gradebook() {}

// return the size of the current vector: scores,

// which represents current gradebook

int getSize() const {

return scores.size();

}

// insert a FinalGrade object, newFG,

// into the end of the current gradebook

void insert(FinalGrade newFG) {

scores.push_back(newFG);

}

// return a FinalGrade object,

// which holds the maximum score in the current gradebook

FinalGrade getMax() const {

FinalGrade max = scores[0];

for (int i=1; i<scores.size(); i++) {

// here, I am assumign that FinalGrade has a method getScore()

if (scores[i].getScore() > max.getScore()) {

max = scores[i];

}

}

return max;

}

// return a FinalGrade object,

// which holds the minimum score in the current gradebook

FinalGrade getMin() const {

FinalGrade min = scores[0];

for (int i=1; i<scores.size(); i++) {

// here, I am assumign that FinalGrade has a method getScore()

if (scores[i].getScore() < min.getScore()) {

min = scores[i];

}

}

return min;

}

// return the average score among all scores in the current gradebook

double getAverage() const {

double avg = 0;

for (int i=1; i<scores.size(); i++) {

// here, I am assumign that FinalGrade has a method getScore()

avg += scores[i].getScore();

}

return avg / (double)(scores.size());

}

// For each FinalGrade object in the current gradebook,

// its score will be increased by the given value

// If the score reaches MAX_SCORE, it does not go beyond

void incrementScore(double value) {

for (int i=1; i<scores.size(); i++) {

// here, I am assumign that FinalGrade has methods getScore() and setScore()

scores[i].setScore(scores[i].getScore() + value);

}

}

// print the FinalGrade objects in the current gradebook

void print() const {

for (int i=1; i<scores.size(); i++) {

// here, I am assumign that FinalGrade has a method getScore()

cout << scores[i].getScore() << endl;

}

}

private:

vector<FinalGrade> scores;

};