Question

In C++

First create the two text file given below. Then complete the main that is given. There are comments to help you. An output is also given You can assume that the file has numbers in it

Create this text file: data.txt (remember blank line at end)

Mickey 90
Minnie 85
Goofy 70
Pluto 75
Daisy 63
Donald 80

Create this text file: data0.txt (remember blank line at end)

PeterPan 18
Wendy 32
Michael 28
John 21
Nana 12

Main

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

const int MAXSIZE = 100;

// Prototypes





int main()
{
    string names[MAXSIZE];
    int ages[MAXSIZE];
    int numElements;
    string fileName;
    double averageAge;
    double median;
    char again;

    do
    {

        cout << "Enter the file name: ";
        cin >> fileName;

        // Call the function fillArray. It has the fileName, the name array and
        // the age array passed in (in that order). It returns the number of people read in
        // Description of function given below



        cout << "Before Sort" << endl;
        // Call the function printArray. It has the name array, age array and
        // the number of people passed in (in that order). 
        // Description of function given below




        // Call the function sort array. It has the name array, age array,
        // and the number of people passed in (in that order).
        // Description of function given below




        cout << "After Sort" << endl;
        // Call the function printArray. It has the name array, age array and
        // the number of people passed in (in that order). 
        // Description of function given below




        cout.setf(ios:: fixed);
        cout.precision(2);
        // Call the function findAverageAge. It has the age array and
        // the number of people passed in (in that order). It stores the value
        // that is returned in the averageAge variable declared above.
        // Description of function given below




        cout << "The average age is: " << averageAge << endl;

        // Call the function determineMedian. This function has the age array
        // and the number of people passed in (in that order). I returns
        // the median age and stores it into the variable median declared
        // above





        cout << "The median age is: " << median << endl;

        cout << endl;
        cout << "Do you want to do this again? (Y/N): ";
        cin >> again;
    } while (toupper (again) == 'Y');
    return 0;
}



// Function: sortArrays
// This function has the name array, the age array and the number 
// of elements passed in. It sorts the data by putting the ages in 
// numerical order. (Hint: the names have to stay with the person,
// so you have to do something with the name array too)





// Function: findAverageAge
// This function has the age array and the number of elements passed in.
// It computes the average of the ages in the array and returns it.





// Function: determineMedian
// This function has the ages array (which is sorted) and the number 
// of elements passed in. It returns the median grade






// Function: printArray
// This function has the name array, the age array and the number 
// of elements passed in.
// It prints the arrays in neat columns (see output)






// Function: fillArray
// This function should open the file with the name that is passed into it. It should
// then read in the names and ages and load them into the appropriate arrays. 
// Make sure you check that you don't exceed the array size.
// If the file has too many names and numbers, your program should not put the 
// extra people in the array, the array will just be full.
// This function determines the number of names and ages in the arrays
// and should return the number.
// This function should not call any other user defined functions.

Sample Output

Enter the file name: data.txt
Before Sort
Mickey         90
Minnie         85
Goofy          70
Pluto          75
Daisy          63
Donald         80
After Sort
Daisy          63
Goofy          70
Pluto          75
Donald         80
Minnie         85
Mickey         90
The average age is: 77.17
The median age is: 77.50

Do you want to do this again? (Y/N): Y
Enter the file name: data0.txt
Before Sort
PeterPan       18
Wendy          32
Michael        28
John           21
Nana           12
After Sort
Nana           12
PeterPan       18
John           21
Michael        28
Wendy          32
The average age is: 22.20
The median age is: 21.00

Do you want to do this again? (Y/N): n

Answer 1

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

const int MAXSIZE = 100;

// Prototypes
int fillArray(string fileName, string names[MAXSIZE], int ages[MAXSIZE]);
void printArray(string names[MAXSIZE], int ages[MAXSIZE], int numElements);
void sortArray(string names[MAXSIZE], int ages[MAXSIZE], int numElements);
double findAverageAge(int ages[MAXSIZE], int numElements);
double determineMedian(int ages[MAXSIZE], int numElements);

int main()
{
   string names[MAXSIZE];
   int ages[MAXSIZE];
   int numElements;
   string fileName;
   double averageAge;
   double median;
   char again;

   do
   {

       cout << "Enter the file name: ";
       cin >> fileName;
       numElements = fillArray(fileName, names, ages);
       // Call the function fillArray. It has the fileName, the name array and
       // the age array passed in (in that order). It returns the number of people read in
       // Description of function given below

       cout << "Before Sort" << endl;
       printArray(names, ages, numElements);
       // Call the function printArray. It has the name array, age array and
       // the number of people passed in (in that order).
       // Description of function given below

       sortArray(names, ages, numElements);
       // Call the function sort array. It has the name array, age array,
       // and the number of people passed in (in that order).
       // Description of function given below

       cout << "After Sort" << endl;
       printArray(names, ages, numElements);
       // Call the function printArray. It has the name array, age array and
       // the number of people passed in (in that order).
       // Description of function given below

       cout.setf(ios::fixed);
       cout.precision(2);  
       // Call the function findAverageAge. It has the age array and
       // the number of people passed in (in that order). It stores the value
       // that is returned in the averageAge variable declared above.
       // Description of function given below

       averageAge = findAverageAge(ages, numElements);
       cout << "The average age is: " << averageAge << endl;
       // Call the function determineMedian. This function has the age array
       // and the number of people passed in (in that order). I returns
       // the median age and stores it into the variable median declared
       // above

       median = determineMedian(ages, numElements);
       cout << "The median age is: " << median << endl;

       cout << endl;
       cout << "Do you want to do this again? (Y/N): ";
       cin >> again;
   } while (toupper(again) == 'Y');
   return 0;
}

// Function: sortArrays
// This function has the name array, the age array and the number
// of elements passed in. It sorts the data by putting the ages in
// numerical order. (Hint: the names have to stay with the person,
// so you have to do something with the name array too)

void sortArray(string names[MAXSIZE], int ages[MAXSIZE], int numElements)
{
   for (int i = 0; i < numElements; i++) // goto every element in the array.
   {
       for (int j = 0; j < numElements - 1; j++) // compare that element with every other element in the array, j < numElements - 1 is important here.
       {
           if (ages[j] > ages[j + 1]) // if first element is greater than second element.
           {
               swap(ages[j], ages[j + 1]); // swap the ages.
               swap(names[j], names[j + 1]); // and swap the name indexes too.
           }
           else if (ages[j] == ages[j + 1]) // if ages are equal.
           {
               if (names[j].compare(names[j + 1]) > 0) // compare with respect to name lexicographically.
               {
                   swap(ages[j], ages[j + 1]); // swap the ages.
                   swap(names[j], names[j + 1]); // and swap the name indexes too.
               }
           }
       }
   }
}

// Function: findAverageAge
// This function has the age array and the number of elements passed in.
// It computes the average of the ages in the array and returns it.

double findAverageAge(int ages[MAXSIZE], int numElements)
{
   double totalAge = 0;
   for (int i = 0; i < numElements; i++)
   {
       totalAge += ages[i]; // sums all the ages in a variable and takes average by divinding it with total elements.
   }
   return totalAge / numElements;
}

// Function: determineMedian
// This function has the ages array (which is sorted) and the number
// of elements passed in. It returns the median grade

double determineMedian(int ages[MAXSIZE], int numElements) // in the even sample, sum of two integers / 2 will not give a double value in c++. i.e (77.50 will be printed 77.00)
{
   double ret = 0;
   if (numElements % 2 == 0) // if array size is even.
   {
       ret = ((double)ages[(numElements / 2) - 1] + (double)ages[numElements / 2]) / 2; // the sum of two middle ages divided by 2 is the median age.
   }
   else // if array size is odd.
   {
       ret = (double)ages[numElements / 2]; // middle index of sorted array contains median age.
   }
   return ret;
}

// Function: printArray
// This function has the name array, the age array and the number
// of elements passed in.
// It prints the arrays in neat columns (see output)

void printArray(string names[MAXSIZE], int ages[MAXSIZE], int numElements)
{
   for (int i = 0; i < numElements; i++)
   {
       cout << names[i] << setw(15) << ages[i] << endl; // printing the data loaded from file.
   }
}

// Function: fillArray
// This function should open the file with the name that is passed into it. It should
// then read in the names and ages and load them into the appropriate arrays.
// Make sure you check that you don't exceed the array size.
// If the file has too many names and numbers, your program should not put the
// extra people in the array, the array will just be full.
// This function determines the number of names and ages in the arrays
// and should return the number.
// This function should not call any other user defined functions.

int fillArray(string fileName, string names[MAXSIZE], int ages[MAXSIZE])
{
   int count = 0;
   ifstream fin(fileName);
   while (!fin.eof()) // while end of file is not reached.
   {
       fin >> names[count] >> ages[count]; // keep taking input.
       count++; // increment count, used for indexing and also for numElements;
       if (count == MAXSIZE) // if count reaches maxsize, that means array is full, so stop taking more input.
       {
           cout << "Array Is Full!";
           break;
       }
   }
   return count - 1;
}

Enter the file name: data.txt Before Sort Mickey Minnie Goofy Pluto Daisy Donald After Sor t Daisy Goofy Pluto Donald Minnie Mickey The average age 1s. /P.T The median age is: 77.00 90 85 63 80 63 80 90 Do you want to do this again? (Y/N): Enter the file name: data0. txt Before Sort PeterPan Wendy Michael John Nana After Sor t Nana PeterPan John Michael Wendy The average age is: 22.20 The median age is: 21.00 28 28 32 Do you want to do this again? (Y/N): rn

please note the comment in determineMedian function defination.

for any query leave a comment here ill get back to you as soon as possible :)

PLEASE DO NOT FORGET TO LEAVE A THUMBS UP! THANKS! :)

Enter the file name: data.txt Before Sort Mickey Minnie Goofy Pluto Daisy Donald After Sor t Daisy Goofy Pluto Donald Minnie Mickey The average age 1s. /P.T The median age is: 77.00 90 85 63 80 63 80 90 Do you want to do this again? (Y/N): Enter the file name: data0. txt Before Sort PeterPan Wendy Michael John Nana After Sor t Nana PeterPan John Michael Wendy The average age is: 22.20 The median age is: 21.00 28 28 32 Do you want to do this again? (Y/N): rn