#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <iostream.h>
#include "ClassList.H"

Student* GetStudent (void);

void main() {
    int      i, count, position;
    long     idNum;
    Student* aStudent;

    ClassList theList;

    cout << endl << endl << "Testing Insert - How many students?" << endl;
    cin >> count;

    for (i = 1; i <= count; ++i) {
        aStudent = GetStudent();
        position = rand() % (theList.GetCount() + 1) + 1;
        theList.Insert (position, aStudent);
    }

    cout << endl << endl;
    theList.Print();

    cout << "Sum of GPA's = " << theList.GetGpaSum() << endl << endl;

    cout << endl << endl << "Testing Find and Delete - How many?" << endl;
    cin >> count;

    int listSize = theList.GetCount();
    if (listSize == 0) {
        listSize = 1;          //  Avoid division by zero inside the loop
    }

    for (i = 1; i <= count; i++) {
        idNum = 100000001L + rand() % listSize;
        position = theList.Find (idNum);
        if (position == 0) {
            cout << "Id Number " << idNum << " not found" << endl;
        } else {
            cout << "Deleting Id Number " << idNum << endl;
            theList.Delete (position);
        }
    }
    
    cout << endl << endl;
    theList.Print();

    cout << endl << endl << "End of Program" << endl;
}


/*  This function automatically generates student data       */
/*  and returns a pointer to a dynamically allocated Student */
/*  object intialized with the values generated.             */

Student* GetStudent() {
    static int counter = 0;

    long  idNum;
    char  name    [MAX_SZ_NAME + 1];
    char  address [MAX_SZ_ADDRESS + 1];
    char  major   [SZ_MAJOR + 1];
    int   month;
    int   day;
    int   year;
    float gpa;

    counter++;
    idNum = 100000000L + counter;
    sprintf (name, "Student %d", counter);
    sprintf (address, "Address for Student %d", counter);
    strcpy (major, "CMSC");
    month = 1;
    day = 1;
    year = 2000;
    gpa = 2.0F + (counter % 21) * 0.1F;

    return (new Student (idNum, name, address, major, month, day, year, gpa));
}