Question

(C++ Program) 1. Write a program to allow user enter an array of structures, with each...

(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

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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 Scor

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