Page 314 - Computer_Science_F5

4. If a = 7, y = 4, z = 3, and u= 2, display roots. The program should
evaluate each of the following
statements, if possible. If it is not
possible, state the reason.
FOR ONLINE READING ONLY
(a) (a + z) % y (b) (a + y % u
(c) (y + u) % a (d) (a + y) *u
(e) (a % y) % z (f) (y% z) % a
(g) (a *z) % y (h) ((a *y) *u) *z
5. Evaluate the following expressions.
(a) 15 / 3 (b) 17 - 12 / 4 * 2
(c) 34 % 7 (d) 3 - 7% 7
(e) 18.0 / 4 (f) 20 - 5 / 2.0
(g) 13 + 5 % 2 - 3
(h) 1570 + 3.0 * 2.0 / 5.0
6. Write the syntax of the following
C++ statements:
(a) Switch case statement
(b) Variable declaration and
initialisation.
7. Suppose you are developing a game
where there are various types of
vehicles, such as cars, trucks, and
motorcycles. How would you use
polymorphism to implement a
drive() method for each vehicle type,
ensuring that the correct behavior is
executed based on the specific type
of vehicle object? Provide a code
example demonstrating the use of
polymorphism in this scenario.
8. Write a C++ program to find all
roots of a quadratic equations. The
program should prompt a user to
enter the coefficient and then,
305
Student’s Book Form Five
Computer Science Form 5.indd 305
also be able to test the type of the
root displayed and state whether
those roots are real distinct, Chapter Four: Object oriented programming with C++
identical or imaginary.
Note: For any quadratic equation
2
ax  bx  c  0, if
2
b  4 ac, the root is real distinct
2
b  4 ac, the root is real identical
b  4 ac, the root is imaginary
2
9. Use a function named “largest”
to create a C++ program that
determines the largest number from
a set of 10 numbers.
10. By using the concept of function,
write a C++ program that prompts
the user to input three integer
values and find the greatest value
of the three values.
11. Write a C++ program that finds
the reverse of number entered by
the user. When the number entered
is ‘5261’ then the reverse value
should be ‘1625’.
12. Given the declaration orodha [100];
(a) What expression represents the
very first element of orodha?
(b) What expression represents the
very last element of orodha?
(c) Write the code fragment that
prints out the contents of
orodha?
(d) Is the expression list[3.0] legal
or illegal?
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