In this lab i read and open a text file that contains names of students and thei

Question

In this lab i read and open a text file that contains names of students and their test scores. I need to print their names and each students' average test score in a table. Why am I getting grabage values for my student averages? Here is my c++ code:

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>

using namespace std;

double calcAverage (double arr[], int n);

double calcMedian (double [], int);

int main()
{
ifstream inputFile;
string nameOfFile, studentName;

//Asking the user for the file name
cout << "Please enter the file name: " << endl;
cin >> nameOfFile;

//Open the file
inputFile.open(nameOfFile.c_str());

//If file cannot be opened, an error message is printed
if(!inputFile)
{
cout << "Error opening file" << endl;
}
else
{
const int MAX_STUDENTS = 12;
double finalScores[MAX_STUDENTS];
const int MAX_SCORES = 10;
double scores[MAX_SCORES];
int k = 0;

cout << "------------------------------" << endl;
cout << setw(8) << "Name " << setw(5) << "|" << " Average" << endl;
cout << "------------------------------" << endl;

while (inputFile >> studentName)
{

for (int i = 0; i < MAX_SCORES; i++)
{
inputFile >> scores[i];

}

finalScores[k] = calcAverage(scores, MAX_SCORES);
k++;

cout << setw(8) << studentName << setw(5) << "|" << setw(5) << finalScores[k] << endl;

}

cout << " " << endl;
cout << "Final Scores From Least to Greatest: " << endl;
cout << "Class Median: " << endl;
cout << "Class Average: " << endl;

cout << "Closing file" << endl;
inputFile.close();

}
return 0;

}
//This function calculates the average score of each student and the average class score
double calcAverage (double arr[], int n)
{
double average;
int totalScores = 0;
for(int k = 0; k < n; k++)
{
totalScores += arr[k];
}
average = totalScores / n;

}

Explanation / Answer

#include <iostream>

#include <fstream>

#include <string>

#include <iomanip>

using namespace std;

double calcAverage (double arr[], int n);

double calcMedian (double [], int);

int main()

{

ifstream inputFile;

string nameOfFile, studentName;

//Asking the user for the file name

cout << "Please enter the file name: " << endl;

cin >> nameOfFile;

//Open the file

inputFile.open(nameOfFile.c_str());

//If file cannot be opened, an error message is printed

if(!inputFile)

{

cout << "Error opening file" << endl;

}

else

{

const int MAX_STUDENTS = 12;

double finalScores[MAX_STUDENTS];

const int MAX_SCORES = 10;

double scores[MAX_SCORES];

int k = 0;

cout << "------------------------------" << endl;

cout << setw(8) << "Name " << setw(5) << "|" << " Average" << endl;

cout << "------------------------------" << endl;

while (inputFile >> studentName)

{

for (int i = 0; i < MAX_SCORES; i++)

{

inputFile >> scores[i];

}

finalScores[k] = calcAverage(scores, MAX_SCORES);

k++;

cout << setw(8) << studentName << setw(5) << "|" << setw(5) << finalScores[k] << endl;

}

cout << " " << endl;

cout << "Final Scores From Least to Greatest: " << endl;

cout << "Class Median: " << endl;

cout << "Class Average: " << endl;

cout << "Closing file" << endl;

inputFile.close();

}

return 0;

}

//This function calculates the average score of each student and the average class score

double calcAverage (double arr[], int n)

{

double average;

double totalScores = 0; //totalScores should be of double datatype

for(int k = 0; k < n; k++)

{

totalScores += arr[k];

}

average = totalScores / n;

return average;//return the calculated average

}

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