Question

C++ programming language

Write a program that asks the user for a file name.
The file contains a series of scores(integers), each written on a separate line.
The program should read the contents of the file into an array and then display the following content:

1) The scores in rows of 10 scores and in sorted in descending order.
2) The lowest score in the array
3) The highest score in the array
4) The total number of scores in the array
5) The average score in the array.
6) The median score in the array.

Program structure should be as follows:

A top level function named TestScoreAnalysis() which accepts a
file of scores to be analyzed and displayed to the console
screen describing the six content items specified above.

-- A function to read data from file into an Array
-- A function to sort an array in descending order

A separate function for each analysis task:
-- The scores in rows of 10 scores and in sorted in descending order.
-- The lowest score in the array
-- The highest score in the array
-- The total number of scores in the array
-- The average score in the array.
-- The median score in the array.

Allocate an array to hold at least 100 scores.

Answer 1

//C++ code

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

//function prototype
void TestScoreAnalysis(ifstream &infile);
// sorted in descending order.
void sort(int arr[], int size);
// The lowest score in the array
int lowestScore(int arr[], int size);
//The highest score in the array
int highestScore(int arr[], int size);
//The total number of scores in the array
int totalScore(int arr[], int size);
//The average score in the array.
double averageScore(int arr[], int size);
// The median score in the array.
double medianScore(int arr[], int size);
void print(int arr[], int size);
//main function
int main()
{
   // asks the user for a file name.
   cout << "Enter file name: ";
   string name;
   cin >> name;
   ifstream infile(name);
   if (!infile)
   {
       cout << "FILE NOT FOUND!" << endl;
       return -1;
   }
   TestScoreAnalysis(infile);
   //pause
   system("pause");
   return 0;
}

//function definition

void TestScoreAnalysis(ifstream &infile)
{
   //Allocate an array to hold at least 100 scores.
   int arr[100];
   //counter
   int c = 0;
   //read score form file
   while (infile>>arr[c])
   {
       //update counter
       c++;
   }
   cout << "Scores:\n";
   print(arr, c);
   cout << "Sorted Array: \n";
   sort(arr, c);
   print(arr, c);
   cout << "Lowest score: " << lowestScore(arr, c) << endl;
   cout << "Highest Score: " << highestScore(arr, c) << endl;
   cout << "Total Score: " << totalScore(arr, c) << endl;
   cout << "Average score: " << averageScore(arr, c) << endl;
   cout << "Median score: " << medianScore(arr, c) << endl;
}
void print(int arr[], int size)
{
   //print 5 numbers in a row
   for (int i = 0; i < size; i++)
   {
       cout << arr[i] << " ";
       if ((i + 1) % 5 == 0)
           cout << endl;
   }
   cout<<endl;
}
void sort(int arr[], int size)
{
   for (int i = 0; i < size; i++)
   {
       for (int j = i + 1; j < size; j++)
       {
           if (arr[i] < arr[j])
           {
               int temp = arr[i];
               arr[i] = arr[j];
               arr[j] = temp;
           }
       }
   }
}
int lowestScore(int arr[], int size)
{
   int min = arr[0];
   for (int i = 0; i < size; i++)
   {
       if (min > arr[i])
           min = arr[i];
   }
   return min;
}
int highestScore(int arr[], int size)
{
   int max = arr[0];
   for (int i = 0; i < size; i++)
   {
       if (max < arr[i])
           max = arr[i];
   }
   return max;
}
int totalScore(int arr[], int size)
{
   int sum = 0;
   for (int i = 0; i < size; i++)
   {
       sum += arr[i];
   }
   return sum;
}
double averageScore(int arr[], int size)
{
   return (double)totalScore(arr, size) / size;
}
double medianScore(int arr[], int size)
{
   double median;
   if (size % 2 == 0)
       median = ((double)arr[size / 2] + (double)arr[size / 2 - 1]) / 2;
   else
       median = (double)arr[size / 2];
   return median;
}

//file

//Output

//If you need any help regarding this solution........ please leave a comment...... thanks