PROGRAM 27


//  FILE NAME:  PROG27.CPP     PROGRAMMER NAME:  ANTHONY F. ORTIZ
//  THIS PROGRAM USES A CLASS CALLED ARRYLIST.  THE MEMBER FUNCTIONS OF
//  ARRAYLIST WILL INITIALIZES THE SIZE OF A FLOATING POINT ARRAY, ADD
//  A FLOATING POINT NUMBER TO THE ARRAY, SHOW A SUB-TOTALS OF THE
//  ARRAY, DISPLAY ALL FLOATING POINT ITEMS, AND CHANGE A FLOATING POINT
//  ITEM.

#include "a2.h"

print_menu ();
char get_selection (arraylist & expenses);
pause_program ();

int main ()
{
    char choice;
    arraylist expenses;
    do
    {
        print_menu ();
        choice = get_selection (expenses);
    }
    while (choice != 'Q');
    return 0;
}

print_menu ()
{
    clrscr ();
    gotoxy (25, 1);
    cout << "MENU OPTIONS";
    gotoxy (30, 3);
    cout << "E -- ENTER EXPENSES";
    gotoxy (30, 4);
    cout << "T -- PRINT TOTAL EXPENSES";
    gotoxy (30, 5);
    cout << "C -- CHANGE EXPENSES";
    gotoxy (30, 6);
    cout << "D -- DISPLAY EXPENSES";
    gotoxy (30, 7);
    cout << "Q -- QUIT PROGRAM";
    gotoxy (25, 9);
    cout << "ENTER SELECTION ";
    return 0;
}

char get_selection (arraylist & expenses)
{
    char choice;
    cin >> choice;
    choice = toupper (choice);
    switch (choice)
    {
        case ('E'):  {
                         expenses.enteritem ();
                         break;
                     }
        case ('T'):  {
                         expenses.printtotal ();
                         pause_program ();
                         break;
                     }
        case ('C'):  {
                         expenses.changelist ();
                         pause_program ();
                         break;
                     }
        case ('D'):  {
                         expenses.viewlist ();
                         pause_program ();
                         break;
                     }
        case ('Q'):  {
                         clrscr ();
                         break;
                     }
    }
    return (choice);
}

pause_program ()
{
    cout << endl << "PRESS ENTER KEY TO CONTINUE ..... ";
    getch ();
    return 0;
}

//  FILE NAME:  A2.H
//  THIS FILE  CONTAINS THE DECLARTION OF THE ARRAYLIST CLASS.

#ifndef arraylist_h
#define arraylist_h

#include 
#include 
#include 

class arraylist
{
    public:
        arraylist :: arraylist ();
        //  POST:  CONSTRUCTOR.

        arraylist :: ~arraylist ();
        //  POST:  DESTRUCTOR.

        void arraylist :: initcount (void);
        //  POST:  INITIALIZE COUNT TO 0.

        void arraylist :: enteritem (void);
        //  POST:  ENTER FLOATING POINT NUMBER.

        void arraylist :: printtotal (void);
        //  POST:  CALCULATE AND PRINT THE TOTAL.

        void arraylist :: viewlist (void);
        //  POST:  VIEW THE LIST OF FLOATING POINT NUMBERS.

        void arraylist :: changelist (void);
        //  POST:  CHANGE OR DELETE A FLOATING POINT NUMBER FROM THE LIST.

    private:
        int count;
        float * list;
};

#include "a2.cpp"
#endif

//  FILE NAME:  A2.CPP
//  THIS FILE CONTAINS THE IMPLEMENTATION OF THE ARRAYLIST CLASS.

#include "a2.h"

arraylist :: arraylist ()
{
    list = new float [100];
    count = 0;
    cout.setf (ios :: showpoint);
    cout.setf (ios :: fixed);
    cout << setprecision (2);
}

arraylist :: ~arraylist ()
{
    delete [] list;
}

void arraylist :: initcount (void)
{
    count = 0;
}

void arraylist :: enteritem (void)
{
    clrscr ();
    cout << "ENTER A FLOATING POINT NUMBER. ";
    cin >> list [count];
    count++;
}

void arraylist :: printtotal (void)
{
    float total = 0;
    clrscr ();
    for (int a = 0; a < count; a++)
    {
        total = total + list [a];
    }
    cout << "THE TOTAL IS " << total << " AND THE SIZE OF THE ARRAY IS ";
    cout << count << endl;
}

void arraylist :: viewlist (void)
{
    clrscr ();
    cout << "HERE IS THE FLOAT OBJECT ARRAY: " << endl << endl;
    for (int a = 0; a < count; a++)
    {
        cout << "FLOAT OBJECT " << (a + 1) << ": " << setw (8) << list [a];
        cout << endl;
    }
}

void arraylist :: changelist (void)
{
    char choice, ans;
    int position, flag;
    float change;
    clrscr ();
    gotoxy (25, 1);
    cout << "MENU CHOICES";
    gotoxy (30, 3);
    cout << "D -- DELETE AN ITEM";
    gotoxy (30, 4);
    cout << "C -- CHANGE AN ITEM";
    gotoxy (25, 6);
    cout << "ENTER A CHOICE: ";
    cin >> choice;
    choice = toupper (choice);
    if (choice == 'D' || choice == 'C')
    {
        clrscr ();
        do
        {
            cout << "ENTER A # FROM 1 .. " << count;
            cout << " TO CHANGE AN ITEM. ";
            cin >> position;
            cout << endl;
        }
        while (position < 1 || position > count);
    }
    switch (choice)
    {
        case ('D'):  {
                         clrscr ();
                         cout << "DELETE FLOATING OBJECT " << position;
                         cout << " " << list [position - 1] << " (Y/N)? ";
                         cin >> ans;
                         ans = toupper (ans);
                         if (ans == 'Y')
                         {
                             flag = 0;
                             for (int a = 0; a < count; a++)
                             {
                                 if (a == (position - 1) || flag == 1)
                                 {
                                     list [a] = list [a + 1];
                                     flag = 1;
                                 }
                             }
                             count--;
                             cout << endl << "FLOATING POINT OBJECT DELETED ";
                             cout << endl;
                         }
                         else
                         {
                             cout << endl << "FLOATING POINT OBJECT NOT DELETED";
                             cout << endl;
                         }
                         break;
                     }
        case ('C'):  {
                         clrscr ();
                         cout << "ENTER NEW FLOATING OBJECT " << position;
                         cout << ": ";
                         cin >> change;
                         cout << endl << "CHANGE FLOATING OBJECT ";
                         cout << position << " " << list [position - 1] << " (Y/N)? ";
                         cin >> ans;
                         ans = toupper (ans);
                         if (ans == 'Y')
                         {
                             for (int a = 0; a < count; a++)
                             {
                                 if (a == (position - 1))
                                 {
                                     list [a] = change;
                                 }
                             }
                             cout << endl << "FLOATING POINT OBJECT CHANGED";
                             cout << endl;
                         }
                         else
                         {
                             cout << endl << "FLOATING POINT OBJECT NOT CHANGED";
                             cout << endl;
                         }
                         break;
                     }
    }
}

//  OUTFILE:  PROG27.OUT

MENU OPTIONS
                                                                                
    E -- ENTER EXPENSES                                
    T -- PRINT TOTAL EXPENSES                          
    C -- CHANGE EXPENSES                               
    D -- DISPLAY EXPENSES                              
    Q -- QUIT PROGRAM                                  
                                                                                
ENTER SELECTION q




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