I have a program exercise from C++ programming 6th edition: pg 585 exercise 6. I

Question

I have a program exercise from C++ programming 6th edition: pg 585 exercise 6. I need to

Use the file in this folder as input but assume that the file name can change so prompt the user.

The file format is different than what is indicated in the book so adapt your code accordingly.

Assume that any answer that is not "T" or "t" or "F" or "f" is invalid and considered wrong. As indicated in the book, treat spaces as no answer.

Use a "switch" statement when determining the grade.

Only display the number of records processed to the console, instead save the output indicated in the book to a file named "FinalGrades.txt".

Below is my code but I have a lot of errors:

#include <iostream>

#include <fstream>

#include <string>

#include <iomanip>

using namespace std;

//function prototypes

void readDataFromFile(ifstream &, char[], string[], string[]);

void calculateScores(char[], string[], double[]);

void calculateGrades(double[], char[]);

//global declarations for constants

const int MAX_ANSWERS = 20;

const int MAX_STUDENTS = 200;

const double MAX_MARKS = 40.0;

//global declarations for a vaiable

int studentsCounter = 0;

//start main function

int main()

{

//variables declaration

ifstream inFIle;

string fileName;

char testAnswers[MAX_ANSWERS];

string studentID[MAX_STUDENTS];

string studentScores[MAX_STUDENTS];

double studentScores[MAX_STUDENTS];

char studentGrades[MAX_STUDENTS];

Prompt the user to enter the name of a file and open the file and display an error message if the file is not found.

//prompt the user to enter the name of a file

cout << "Enter the file name:";

cin >> fileName;

/*open the file and display an error messageif the file not found*/

inFile.open(FinalGrades.txt);

if (InFile)

{

/*display an error message if the file not found and exit the program */

cout << "FinalGrades.txt" << FileName

<< "is not found." << endl;

system("pause");

return 1;

}//end if

Call readDataFromFIle, calculateScores, and calculateGrades functions to read data and calculate score and grade of students.

//call readDataFromFile function

readDataFromFIle(inFile, testAnswers, studentID, studentAnswers);

//call calculateScores function

calculateScores(testAnswers, studentAnswers, studentScores);

//call calculateGrades function

calculateGrades(studentScores, studentGrades);

Display the details of each student as ID, answers, score, and grade respectively.

//display the results

cout << "

Results of the students."<<endl;

cout << "Student_ID Student_Answers Score Grade"

<< endl;

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

for (int student = 0, student < st[studentsCounter; student++)

{

cout << studentID[student] << " "

<< studentAnswers[student] << " "

<< studentScores[student] << " "

<< studentGrades[student] << endl;

}//end for

//close the input file

inFile.close();

//pause the system for a while

system("pause");

return 0;

}//end of main function

Explanation / Answer

Program:

#include <iostream>

#include <fstream>

#include <string>

#include <iomanip>

using namespace std;

//function prototypes

void readDataFromFile(ifstream &, char[], string[], string[]);

void calculateScores(char[], string[], double[]);

void calculateGrades(double[], char[]);

//global declarations for constants

const int MAX_ANSWERS = 20;

const int MAX_STUDENTS = 200;

const double MAX_MARKS = 40.0;

//global declarations

int studentsCounter = 0;

char testAnswers[MAX_ANSWERS];

string studentID[MAX_STUDENTS];

string studentAnswers[MAX_STUDENTS];

double studentScores[MAX_STUDENTS];

char studentGrades[MAX_STUDENTS];

//start main function

int main()

{

//variables declaration

       ifstream inFile;

       string fileName;

//Prompt the user to enter the name of a file and open the file and display an error message if the file is not found.

//prompt the user to enter the name of a file

cout << "Enter the file name:";

cin >> fileName;

/*open the file and display an error messageif the file not found*/

inFile.open("FinalGrades.txt");

if (inFile)

{

/*display an error message if the file not found and exit the program */

cout << fileName<< " is not found." << endl;

system("pause");

return 1;

}//end if

//Call readDataFromFIle, calculateScores, and calculateGrades functions to read data and calculate score and grade of students.

//call readDataFromFile function

readDataFromFile(inFile, testAnswers, studentID, studentAnswers);

//call calculateScores function

calculateScores(testAnswers, studentAnswers, studentScores);

//call calculateGrades function

calculateGrades(studentScores, studentGrades);

//Display the details of each student as ID, answers, score, and grade respectively.

//display the results

cout << " Results of the students."<<endl;

cout << "Student_ID Student_Answers Score Grade"<< endl;

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

for (int student = 0; student < studentsCounter; student++)

{

cout << studentID[student] << " "

<< studentAnswers[student] << " "

<< studentScores[student] << " "

<< studentGrades[student] << endl;

}//end for

//close the input file

inFile.close();

//pause the system for a while

system("pause");

return 0;

}//end of main function

Note: check bolded statements. errors occured due to wrong identifiers (ex: InFile instead of inFile.)

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