University Of Sargodha 2025 OOP Object Oriented Programming BSIT Subjective Part

University or Sargodha

l)eparttiient or

PIWI". ()biect Oriented Code;CM1'C-5202 Time 1.5

Section: Reg+ SS14SS2 semester: 2nd

Max Marks: 20

Exam: Mid Term , spring 2025

Marks:5

Questiop Nol

CLO-I

Imagine a publishing company that markets both book and audiocassette

versions of its works. Create a class publication that stores the title (a string)

and price (type float) Of a publication. From this class derive two classes:

book, which adds a page count (type int), and tape, which adds a playing time

(jn minutes (type float). Each of these three classes should have a getdata()

timction to get its data from the user at the keyboard, and a putdata() function

to display its data. Write a main() program to test the book and tape classes

by creating instances ofthem, asking the user to fill in data with getdata(), and

then displaying the data With putdata().

Create a class that includes a data member that holds a "serial number" for

each object created from the class. That is, the first object created will be

numbered 1, the second 2, and so on. To do this, you'll need another data

member that records a count of how many objects have been created so far.

(This member should apply to the class as a whole; not to individual objects.

What keyword specifies this?) Then, as each object is created, its constructor

can examine this count member variable to determine the appropriate serial

number for the new object. Add a member function that permits an object to

report its own serial number. Then write a main() program that creates three

objects and queries each one about its serial number. They should respond I

am object number 2, and so on.

ucstion N03

CLOS

Marks:5

Write a program that substitutes an overloaded += operator for the overloaded

+ operator in the SPI'RPLUS program in this chapter. This operator should

allow statements like sl += s2; where s2 is added (concatenated) to sl and the

result is left in s!. The operator should also permit the results of the operation

Cho be used in other calculations, as in s3—sI += s2;

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