COP3014-Foundations of Computer Science Assignment #10

COP3014-Foundations of Computer Science
Assignment #10
Objectives:
1. Implement a friend function of a class;
2. Overload the << operator as a friend function of a class with chaining;
3. Overload the – operator as a member function of a class with chaining;
This assignment is an extension of Programming Assignment 9 (Module 10’s Programming
Assignment). You will implement class called “order_class”. The class will manage a
dynamic array of purchase order records. Called the program for this assignment
"nursery_orders10.cpp". I have provided a skeleton (driver) of “nursery_orders10.cpp” to
help you implement this program.
Your input data will be in the file “nursery_stock.txt”. The descriptions of the functions
you will implement are as follows:
1. (You implemented this function in the previous program.) the default constructor
to initialize the state of your class. The default constructor will read the data from the
file “nursery_stock.txt” into the dynamic array STR. If STR becomes full, the function
should call the function “double_size” to double the size (capacity) of STR.
Remember, count, size, and STR are private members of your class and do not need to
be passed to a member function of your class.
2. (You implemented this function in the previous program.) is_Empty is a Boolean
public member function of the class. It has no formal parameters because count is a
member of the state of the class (private member) and does not need to be passed to it
because the state of the class is known to all member functions of the class. If count ==
0 then true is returned; otherwise false is returned.
3. (You implemented this function in the previous program.) is_Full is a Boolean
public member function of the class. It has no formal parameters because count and
size are members of the state of the class (private members) and they do not need to be
passed to it because the state of the class is known to all member functions of the class.
If count== size then true is return; otherwise false. The size is the capacity which is the
total number of cells allocated to STR.
4. (You implemented this function in the previous program.) search is an integer
public member function that has only one formal parameter, the key. key is the plant
name for the record you are searching for. The array of records, STR and count are
members of the state of the class and do not need to be passed to a member function of
the class; The function will return the location of key in STR if it is there; otherwise -1
is returned.
5. (You implemented this function in the previous program.) add is a void public
member function that inserts information for an order record into STR. Duplicates
plant names are okay; add will prompt the user for the plant name (pname), county
name (cname), plant cost (plant_cost), and the quantity (quantity. You may call
process record to re-process STR when you add a new record. add has no formal
parameters. Remember, to call the function double_size if STR is full before you add a
new order record.
6. Overload the operator “-“ as member function of order_class with chaining. This
function will have the same functionality as the “remove” function from the
previous assignment. Recall the following about the function remove: “remove is
a public member function that deletes all records with the plant name that matches the
value stored in key. If duplicate records exist with the same plant name they must all
be deleted. “remove” has only one formal parameter, the key.” Note, because we are
overloading with chaining we must return the current object “*this”.
7. (You implemented this function in the previous program.) double_size is a void
public member function that doubles the size (capacity) of STR. “double_size” has no
formal parameters because size, count and STR are all members of the state of the
class, order_class. First, size is multipled by two; second, memory is allocated using
the statement “order_record *temp = new order_record[size]; third the records in STR
are copied into temp with the statement “temp[i]=STR[i]” using a for loop. Forth, the
old memory for STR is de-allocated using “delete [ ] STR”; Finally, STR is set to point
to the new memory pointed to by temp using “STR = temp”.
8. (You implemented this function in the previous program.) process has no formal
parameters because they are already declared in the state of the class. The function will
calculate the net cost of the purchase (net_cost), the taxrate (tax_rate), the tax on the
purchase (purchase_tax), the discount on the purchase (discount), and the total cost
(total_cost). Please consider the following information to help you implement the
necessary calculations:
a. The tax rate (in percent) on a purchase is based on the county where the
purchase was made. If the county was dade, the tax rate is 6.5%; if the count is
broward, the tax rate is 6%; if the county was palm, the tax rate is 7%.
b. The net cost of an order (net_cost), which does not include tax, is calculated by
the following:
net_cost = (quantity x plant_cost)
c. The discount is based on the quantity of plants in the purchase.
The discount is determined as follows:
• If quantity equals 0, then the discount percentage is 0% of the net cost;
• If 1<=quantity<=5 then discount percentage of the net cost is 1%;
• If 6<=quantity<=11 then discount percentage of the net cost is 3%;
• If 12<=quantity<=20 then discount percentage of the net cost is 5%;
• If 21<=quantity<=50 then discount percentage of the net cost is 8%;
• If quantity >05 then discount percentage is 13%;
Note: Apply discount percentage after the net cost has been calculate
discount = net_cost * (discount_percentage) / 100;
 (drop / 100 if you converted the discount_percentage to a decimal)
d. The tax on a purchase (order_tax) is calculated by the following formula:
 purchase_tax = (net_cost * tax_rate / 100 (drop /100 if you converted the
 rate from a percentage)
e. The total cost of a purchase (rounded to the nearest hundredth) is calculated by
the following formula:
total_cost = net_cost + purchase_tax – discount.
Note: All tax and cost calculations should be rounded to the nearest
hundredths.
9. Overload operator “<<” as a friend function of order_class with chaining. This
function will have the same functionality as the “print” function in the previous
assignment, except it will print to the screen. Recall the following about the
function print: “print is a public member function that has no formal parameters
because count and STR are members of the state of the class. The function will also
have one static local integer variable called “run”. The function will print the value of
run every time print is executed. The value of “run” should be incremented after you
print its value the file. The function will print every field of every order_record in
STR to the screen.
10. (You implemented this function in the previous program.) the destructor to deallocate all memory allocated to STR. This function has no formal parameters because
STR is a member of the state of the class; the destructor will be called automatically
by the compiler.
You may implement more member functions if you find it necessary. Please start the
assignment ASAP, and ask questions to make sure you understand what you must do. It is
always good to start with the skeleton program (nursery_orders10.cpp) I provided.
Remember to follow all style rules and to include all necessary documentation (consistent,
indentation, proper variable names, pre/post conditions, program header, function headers, and
so forth.) .
Output Formatfor the Function "operator<<":
1. Use the following format information to print the variables:
 Field Format
======================================
Plant Name string
County Name string
Plant Cost XXXX.XX
Quantity of Plants XXXX
Net Cost of Purchase XXXXX.XX
Tax Rate X.XXX
Purchase Tax XXXXX.XX
Discount on Purchase XXXX.XX
Total Cost of Purchase XXXXXXX.XX
2. Consider the following sample output table when designing and
implementing the function “operator<<”:
(The output is in the following order: plant name, county name, plant cost,quantity,
net cost, tax rate, purchase tax,discount,total cost).
owl dade 10.55 100 1055.00 0.065 68.58 126.60 996.98
hibiscus broward 15.82 15 237.30 0.06 14.24 11.87 239.67
rose dade 9.99 45 449.55 0.065 29.22 35.96 442.81
carnation palm 7.99 32 255.68 0.07 17.90 20.45 253.12
3. Input Stream
In the assignment you will declare one ifstream to bind your input to the file
“nursery_stock.txt” to an input file stream. Whenever a program performs file i/o you
must include the “fstream” library. Add the following statements to your program:
For source file,“nursery_porders10.cpp”
• Add “#include <fstream>”to your # include statements in your source file.
• Add “#include <string>” to your # include statement in your source file.
• Add “#include <iomanip>” all formatting of output
 4. Copy of Nursery_stock.txt:
owl dade 10.55 100
hibiscusbroward 15.82 15
rose dade 9.99 45
carnation palm 7.99 32
rose palm 7.99 60
widow palm 25.75 5
carnation dade 12.55 10
carnation dade 12.55 8
lilly broward 6.92 150
xerabtgemum palm 13.63 50
yarrow dade 22.85 20
zenobiapalm 37.19 32
zephyranthes broward 62.82 40
daisy broward 15.99 80
aconitum dade 30.02 72
amaryllis dade 16.14 65
bogonia broward 18.45 3
bellflowbroward 2.96 200
bergenia palm 85.92 10