C++ Assign GradeBook

Hi and thanks in advanced. I'm working on this H.W. and I'm beginner. I keep on running on in M.S. VS Professional but keeps returning too many errors and I fix them, yet same issues not sure if what I had added to the code is wrong. The results should display its takes no more than 30 char. it should display total number of students received a grade, the average, and class average in one digit double value and GPA. Here is the code:

#include <iostream>
#include "GradeBook.h" // include definition of class GradeBook
using namespace std;

// constructor initializes courseName with string supplied as argument;
// initializes counter data members to 0
GradeBook::GradeBook(string name)
{
    cout << "The Grade Book Constructor is called" << endl;
    setCourseName(name); // validate and stores courseName
     aCount = 0; // initialize count of A grades to 0 
     bCount = 0; // initialize count of B grades to 0
     cCount = 0; // initialize count of C grades to 0
     dCount = 0; // initialize count of D grades to 0
     fCount = 0;  // initialize count of F grades to 0
     displayMessage();
     cout << "The Grade Book," << getCourseName() << "Contains" << endl << endl < endl;
     displatGradeReport(0);
     cout << "*****The end of Grade Book Constructor.*****" << endl;
} // end GradeBook constructor

// function to set the course name; limits name to 25 or fewer characters
void GradeBook::setCourseName( string name )
{
   if ( name.size() <= 30 ) // if name has 30 or fewer characters
      courseName = name; // store the course name in the object
   else // if name is longer than 30 characters
   { // set courseName to first 30 characters of parameter name
      courseName = name.substr( 0, 30 ); // select first 25 characters
      cerr << "Name \"" << name << "\" exceeds maximum length (30).\n"
         << "Limiting courseName to first 30 characters.\n" << endl;
   } // end if...else
} // end function setCourseName

// function to retrieve the course name
string GradeBook::getCourseName() 
{
   return courseName;
} // end function getCourseName

// display a welcome message to the GradeBook user
void GradeBook::displayMessage() 
{
   // this statement calls getCourseName to get the 
   // name of the course this GradeBook represents
   cout << "Welcome to the grade book for\n" << getCourseName() << "!\n" 
      << endl;
} // end function displayMessage

// input arbitrary number of grades from user; update grade counter
void GradeBook::inputGrades() 
{
   int grade; // grade entered by user

   cout << "Enter the letter grades." << endl;
   cout << "Enter the EOF character to end input." << endl;
   cout << "Use Ctl + D, or Ctl + Z)" << endl;

   // loop until user types end-of-file key sequence
   while ( ( grade = cin.get() ) != EOF )
   {
      // determine which grade was entered
      switch ( grade ) // switch statement nested in while
      {
         case 'A': // grade was uppercase A
         case 'a': // or lowercase a
            ++aCount; // increment aCount
            break; // necessary to exit switch

         case 'B': // grade was uppercase B
         case 'b': // or lowercase b
            ++bCount; // increment bCount    
            break; // exit switch

         case 'C': // grade was uppercase C
         case 'c': // or lowercase c
            ++cCount; // increment cCount    
            break; // exit switch

         case 'D': // grade was uppercase D
         case 'd': // or lowercase d
            ++dCount; // increment dCount    
            break; // exit switch

         case 'F': // grade was uppercase F
         case 'f': // or lowercase f
            ++fCount; // increment fCount    
            break; // exit switch

         case '\n': // ignore newlines,  
         case '\t': // tabs, 
         case ' ': // and spaces in input
            break; // exit switch

         default: // catch all other characters
             cout << "****Incorrect letter grade entered.****" << endl;
             cout << " Enter a new grade." << endl;
            break; // optional; will exit switch anyway
      } // end switch
   } // end while
} // end function inputGrades

// display a report based on the grades entered by user
void GradeBook::displayGradeReport() 
{
   // output summary of results
  // total grades
    int gradeCount = aCount + bCount + cCount + dCount + fCount;
    cout << "\n\nThe total number of students receive grade is" << gradeCount << endl;
   cout << "Number of students who received each letter grade:" 
      << "\nA: " << aCount // display number of A grades
      << "\nB: " << bCount // display number of B grades
      << "\nC: " << cCount // display number of C grades 
      << "\nD: " << dCount // display number of D grades
      << "\nF: " << fCount // display number of F grades
      << endl;
} // end calculate number of grades received

// display class average
// if user entered at least one grade
if (gradeCount != 0)
{
    // calculate total grades
    int gradeTotal = 4 * aCount + 3 * bCount + 2 * cCount + 1 * dCount;

    // set floating-point number format
    cout << fixed << setprecision(1);

    // compute and display class GPA with 1 digit of precision
    cout << "\nThe class average is: "
        << static_cast< double > (gradeTotal) / gradeCount
        << endl << endl << endl;
} // end if
} // end function displayGradeReport  
void GradeBook::displayGradeReport(int n)
{
    // display summary of results
    // calculate total grades
    int gradeCount = aCount = bCount = cCount = dCount = fCount = n;
    cout << "The total number of students receive grades is " << gradeCount << endl;
    cout << "Number of students who received each letter grade:"
        << "\nA: " << aCount // display number of A grades
        << "\nB: " << bCount // display number of B grades
        << "\nC: " << cCount // display number of C grades 
        << "\nD: " << dCount // display number of D grades
        << "\nF: " << fCount // display number of F grades
        << endl << endl;

    // calculate total grades


    // display class average
    // calculate total grades
    int gradeTotal = 4 * aCount + 3 * bCount + 2 * cCount + 1 * dCount;

    // set floating-point number format
    cout << fixed << setprecision(1);

    // compute and display class GPA with 1 digit of precision
    if (gradeCount != 0)
    {
        cout << "\nThe class average is: "
            << static_cast< double > (gradeTotal) / gradeCount
            << endl << endl << endl;
    }
    else
    {
        cout << "\nThe class average is: 0.0" << endl << endl << endl;
    }
} // end function displayGradeReport

Here is the .h

#include <string> // program uses C++ standard string class
using namespace std;

// GradeBook class definition
class GradeBook
{
public:
   GradeBook( string ); // initialize course name
   void setCourseName( string ); // set the course name
   string getCourseName(); // retrieve the course name
   void displayMessage(); // display a welcome message
   void inputGrades(); // input arbitrary number of grades from user
   void displayGradeReport();  // display report based on user input
private:
   string courseName; // course name for this GradeBook
   int aCount; // count of A grades
   int bCount; // count of B grades
   int cCount; // count of C grades
   int dCount; // count of D grades
   int fCount; // count of F grades
}; // end class GradeBook  

And here is the file I'm executing from in the project

include // program uses C++ standard string class

using namespace std;

// GradeBook class definition
class GradeBook
{
public:
   GradeBook( string ); // initialize course name
   void setCourseName( string ); // set the course name
   string getCourseName(); // retrieve the course name
   void displayMessage(); // display a welcome message
   void inputGrades(); // input arbitrary number of grades from user
   void displayGradeReport();  // display report based on user input
private:
   string courseName; // course name for this GradeBook
   int aCount; // count of A grades
   int bCount; // count of B grades
   int cCount; // count of C grades
   int dCount; // count of D grades
   int fCount; // count of F grades
}; // end class GradeBook