Question

c++

Instructions

Overview
In this programming challenge you will create a program to handle student test scores.  You will have three tasks to complete in this challenge.
Instructions

Task 1

Write a program that allocates an array large enough to hold 5 student test scores. Once all the scores are entered, the array should be passed to a function that sorts them in ascending order. Another function should be called that calculates the average score. The program should display the sorted list of scores and averages with appropriate headings.

Input Validation: Do not accept negative numbers for test scores.

Task 2

Modify the program so the lowest test score is dropped. This score should not be included in the calculation of the average.
Task 3
Modify the program to allow the user to enter name-score pairs. For each student taking a test, the user types the student’s name followed by the student’s integer test score. Modify the sorting function so it takes an array holding the student names and an array holding the student test scores. When the sorted list of scores is displayed, each student’s name should be displayed along with his or her score.

Answer 1

Task 1:

#include <iostream>

using namespace std;

//function to sort the array arr of size n.

//using bubble sort to sort the array

void sortScores(int arr[], int n) {

for (int i = 0; i < n-1; i++)

{

for (int j = 0; j < n-i-1; j++)

{

if (arr[j] > arr[j+1])

{

int temp = arr[j];

arr[j] = arr[j+1];

arr[j+1] = temp;

}

}

}

}

//functuin to calculate the average of the array arr or size n.

double average(int arr[], int n) {

double sum = 0;

//calculating sum of all elements

for(int i = 0 ; i < n ; i ++) {

sum += arr[i];

}

return sum/n;

}

int main() {

//declaring array

int score[5];

//reading user input

cout << "Enter scores of student: " << endl;

for(int i = 0; i < 5 ; i ++) {

int temp;

cout << "Student " << i+1 << ": ";

cin >> temp;

//checking if the entered score is negative

while(temp < 0) {

cout << "Score should be a positive number!!" << endl;

cout << "Student " << i+1 << ": ";

cin >> temp;

}

score[i] = temp;

}

sortScores(score, 5); //calliung to sort the array

int sum = 0;

cout << "\n\nStudent Scores: \n";

//pritng the student scores

for(int i = 0 ; i < 5 ; i++){

cout << "Student " << i+1 << ": " << score[i] << endl;

}

//printing average

cout << "\n\nAverage score: " << average(score, 5) << endl;

}

_________________________________________________________________________________________________________________________________________________________________________________________________

Task 2:

#include <iostream>

using namespace std;

//function to sort the array arr of size n.

//using bubble sort to sort the array

void sortScores(int arr[], int n) {

for (int i = 0; i < n-1; i++)

{

for (int j = 0; j < n-i-1; j++)

{

if (arr[j] > arr[j+1])

{

int temp = arr[j];

arr[j] = arr[j+1];

arr[j+1] = temp;

}

}

}

}

//functuin to calculate the average of the array arr or size n.

double average(int arr[], int n) {

double sum = 0;

//calculating sum of all elements

for(int i = 0 ; i < n ; i ++) {

sum += arr[i];

}

return sum/n;

}

//drop

void dropLowest(int arr[], int n,int* newArr, int *size) {

//initialisng value to 0

*size = 0;

//findign the min, valkue in array

int min = arr[0];

for(int i = 1 ; i < n ; i++) {

if(min > arr[i]) min = arr[i];

}

//if value is not equal to min, then add it to new array and update new array size

for(int i = 0 ; i < 5 ; i ++) {

if(arr[i] != min){

newArr[*size] = arr[i];

*size += 1;

}

}

}

int main() {

//declaring array

int score[5];

//reading user input

cout << "Enter scores of student: " << endl;

for(int i = 0; i < 5 ; i ++) {

int temp;

cout << "Student " << i+1 << ": ";

cin >> temp;

//checking if the entered score is negative

while(temp < 0) {

cout << "Score should be a positive number!!" << endl;

cout << "Student " << i+1 << ": ";

cin >> temp;

}

score[i] = temp;

}

sortScores(score, 5); //calliung to sort the array

int sum = 0;

cout << "\n\nStudent Scores: \n";

//pritng the student scores

for(int i = 0 ; i < 5 ; i++){

cout << "Student " << i+1 << ": " << score[i] << endl;

}

//printing average

cout << "\n\nAverage score: " << average(score, 5) << endl;

//drop the lowest test score.

//this variable will store the size of the new array without the lowest score.

int size;

int newScore[5];

dropLowest(score, 5, newScore, &size);

cout << "\n\nStudent Scores without lowest: \n";

//pritng the student scores

for(int i = 0 ; i < size ; i++){

cout << "Student " << i+1 << ": " << newScore[i] << endl;

}

cout << "\n\nNew Average score: " << average(newScore, size) << endl;

}

______________________________________________________________________________________________________________________________________________________________________________________________________

Task 3:

#include <iostream>

using namespace std;

//function to sort the array arr of size n.

//using bubble sort to sort the array

void sortScores(int arr[], string name[], int n) {

for (int i = 0; i < n-1; i++)

{

for (int j = 0; j < n-i-1; j++)

{

//as we swap the score, same we swap the names

if (arr[j] > arr[j+1])

{

int temp = arr[j];

string tempS = name[j];

arr[j] = arr[j+1];

name[j] = name[j+1];

arr[j+1] = temp;

name[j+1] = tempS;

}

}

}

}

//functuin to calculate the average of the array arr or size n.

double average(int arr[], int n) {

double sum = 0;

//calculating sum of all elements

for(int i = 0 ; i < n ; i ++) {

sum += arr[i];

}

return sum/n;

}

//drop

void dropLowest(int arr[], int n,int* newArr, int *size) {

//initialisng value to 0

*size = 0;

//findign the min, valkue in array

int min = arr[0];

for(int i = 1 ; i < n ; i++) {

if(min > arr[i]) min = arr[i];

}

//if value is not equal to min, then add it to new array and update new array size

for(int i = 0 ; i < 5 ; i ++) {

if(arr[i] != min){

newArr[*size] = arr[i];

*size += 1;

}

}

}

int main() {

//declaring array

int score[5];

string name[5];

//reading user input

cout << "Enter student details: " << endl;

for(int i = 0; i < 5 ; i ++) {

int temp;

cout << "Student " << i+1 << ":\n";

cout << "Name: ";

cin >> name[i];

cout << "score: ";

cin >> temp;

//checking if the entered score is negative

while(temp < 0) {

cout << "Score should be a positive number!!" << endl;

cout << "score: ";

cin >> temp;

}

score[i] = temp;

}

sortScores(score, name, 5); //calliung to sort the array

int sum = 0;

cout << "\n\nStudent Scores: \n";

//pritng the student scores

for(int i = 0 ; i < 5 ; i++){

cout << "Student " << i+1 << ": Name: " <<name[i] << "\t\tScore: "<<score[i] << endl;

}

//printing average

cout << "\n\nAverage score: " << average(score, 5) << endl;

//drop the lowest test score.

//this variable will store the size of the new array without the lowest score.

int size;

int newScore[5];

dropLowest(score, 5, newScore, &size);

cout << "\n\nStudent Scores without lowest: \n";

//pritng the student scores

for(int i = 0 ; i < size ; i++){

cout << "Student " << i+1 << ": " << newScore[i] << endl;

}

cout << "\n\nNew Average score: " << average(newScore, size) << endl;

}