// Example 7.6. Program to find the grade average for each student   

#include "gradbook.h"

int main(void)   
{
   int ReadNumStudents(void);  // prototype

   cout << "This program finds the average for each student.\n\n";
   int NumStudents;    // number of students in class
   NumStudents = ReadNumStudents();

   GradeBook grades;   // grade book for a class
   float average;      // student's average

   for (int student = 1; student <= NumStudents; student++)
   {
      average = grades.GetAverage(student);
      cout << "\nAverage for student " << student << " = "
           << setiosflags(ios::fixed) << setprecision(1)
           << average << "%\n";
   }
   return 0;
}

//   
// Function to read and return the number of students
// Pre:  none   
// Post: The (positive) number of students was returned.   
//    

int ReadNumStudents(void)   
{
   int NumStudents;  // number of students in class

   cout << "How many students are in the class? ";
   cin  >> NumStudents;
   while (NumStudents <= 0)
   {
      cout << "The number of students must be positive.\n";
      cout << "How many students are there? ";
      cin  >> NumStudents;
   }
   return NumStudents;   
}