Question

(C++ Program)

1. Write a program to allow user enter an array of structures, with each structure containing the firstname, lastname and the written test score of a driver.

- Your program should use a DYNAMIC array to make sure user has enough storage to enter the data.

- Once all the data being entered, you need to design a function to sort the data in descending order based on the test score.

- Another function should be designed to display the hightest, lowest and average test scores in all the test takers along with their name.

2. Design a class called XY. Design the class to have two private interger members X and Y.

- Provide a default constructor. Set both X and Y to be default value 0

- Provide a constructor with parameter. Initialize X and Y to be parameter values.

- Provide a copy constructor.

- Provide set and get member functions.

- Overload the + operator to enable adding of two XY instances. You are supposed to add their X part together and their Y part together.

- Overload the == operators to allow comparisons of two XY instances.

- Enable input and output of XY instance through the overloaded >> and << operators.

- You need to design a class header file, an implementation file and a driver file . The driver file needs to test out each of the member functions completely

(show output and comments)

Answer 1

As per HomeworkLib policy we are supposed to answer the first complete question. Request you to post the second question separately. Thanks

Code for Question 1:

#include <iostream>
#include <string>
#include <iomanip>
using namespace std;

struct driver
{
string firstname;
string lastname;
int score;
};

void sortDescending(driver* drivers, int n);
void displayStats(driver* drivers, int n);
void display(driver* drivers, int n);

int main()
{
int n;
driver* drivers = NULL;

cout << "How many drivers? ";
cin >> n;

drivers = new driver[n];

for(int i = 0; i < n; i++)
{
cout << "Driver " << (i+1) << endl;
cout << "\tFirst name: ";
cin >> drivers[i].firstname;
cout << "\tLast name: ";
cin >> drivers[i].lastname;
cout << "\tScore: ";
cin >> drivers[i].score;
cout << endl;
}

cout << "Before sorting the list of drivers is " << endl;
display(drivers, n);

sortDescending(drivers, n);

cout << "After sorting the list of drivers is " << endl;
display(drivers, n);
displayStats(drivers, n);

delete[] drivers;

}

void sortDescending(driver* drivers, int n)
{
int maxIdx;
for(int i = 0; i < n; i++)
{
maxIdx = i;
for(int j = i+1; j < n; j++)
{
if(drivers[j].score > drivers[maxIdx].score)
maxIdx = j;
}

if(maxIdx != i) //swap
{
driver temp = drivers[i];
drivers[i] = drivers[maxIdx];
drivers[maxIdx] = temp;
}
}
}

void display(driver* drivers, int n)
{
cout << left << setw(15) << "First name" << setw(15) << "Last name" << setw(10) << "Score" << endl;
for(int i = 0; i < n; i++)
{
cout << left << setw(15) << drivers[i].firstname
<< setw(15) << drivers[i].lastname <<
setw(10) << drivers[i].score << endl;

}
cout << endl;
}

void displayStats(driver* drivers, int n)
{
int highIdx = 0, lowIdx = 0;
double avg = 0;

for(int i = 0; i < n; i++)
{
if(drivers[i].score > drivers[highIdx].score)
highIdx = i;
else if(drivers[i].score < drivers[lowIdx].score)
lowIdx = i;
avg += drivers[i].score;
}

avg /= n;

cout << drivers[highIdx].firstname << " " << drivers[highIdx].lastname << " has scored highest score of " << drivers[highIdx].score << endl;
cout << drivers[lowIdx].firstname << " " << drivers[lowIdx].lastname << " has scored lowest score of " << drivers[lowIdx].score << endl;

cout << "The average score of all drivers is " << fixed << setprecision(2) << avg << endl;
}

How many drivers? 3 Driver 1 First name: John Last name: Smith Score: 85 Driver 2 First name: Michael Last name: Jackson Score: 70 Driver 3 First name: Robert Last name: Williams Score: 88 Before sorting the list of drivers is First name John Michael Robert Last name Smith Jackson William:s Score 85 70 After sorting the list of drivers is First name Robert John Michael Score Last name Williams Smith Jackson 85 70 Robert Williams has scored highest score of 88 Michael Jackson has scored lowest score of 70 The average score of all drivers is 81.00