GradeBook.cpp

#include <cstdlib>
#include <iostream>
#include "GradeBook.h"
 
using namespace std;
 
         void GradeBook::displayMessage(int no){
              cout << "welcome to course " << no << endl;
         }
         void GradeBook::displayMessage(){
              cout << "welcome to course " << getCourseNo() << endl;
         }
         void GradeBook::setCourseNo(int no){
              courseNo = no;
         }
         int GradeBook::getCourseNo(){
              return courseNo;
         }
 
         double GradeBook::determineCourseAverage(){
              int grade, counter = 0;
              double avarage = 0.0;
 
              cout << "enter the grade!" << " (student no" << counter+1 << ")" << endl;
              cin >> grade;
 
              while (grade >=0){
                    avarage += grade;
                    counter++;
                    cout << "again, enter the grade!" << " (student no" << counter+1 << ")" << endl;
                    cin >> grade;
              }
 
              if (counter > 0){
                 avarage = avarage / counter;
                 return avarage;
              }
              else
                 return 0.0;
         }