CSC425_7

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CONFIDENTIAL

CS/APR 2007/CSC425

UNIVERSITI TEKNOLOGI MARA

FINAL EXAMINATION

COURSE

COURSE CODE

EXAMINATION

TIME

: INTRODUCTION TO COMPUTER PROGRAMM ING

: CSC425

: APR IL 2007

: 3 HOURS

INSTRUCTIONS TO CANDIDATES

1 .

This question paper consists of two (2) parts : PART A (9 Questions)

PART B (2 Questions)

2. Answer ALL questions from all two (2) parts in the Answ er Booklet. Start each answer on a

new page.

3. Do not bring any material into the examination room unless permission is given by the

invigilator.

4 . Please check to make sure that this examination pack consists of:

i) the Ques tion Paper

ii) an Answ er Booklet - provided by the Faculty

DO NOT TURN THIS P GE UNTIL YOU RE TOLD TO DO SO

This examination paper consists of 7 printed pages

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CONFIDENTIAL 2 CS/APR 2007/CSC425

PART

A

70 MARKS)

QUESTION

Given the following declarations

double x = 5.5, y = -2.5;

int m = 20, n = 6;

string s = "Hello there ", t = "World";

What

are the

values

of

the following expressions?

a )

x +

n * y -

x + n ) * y

b ) m / n + m % n +

5 * x - n / 5

c ) s t a t i c _ c a s t < i n t > x

+ 3 . 0 ) +

s q r t s q r t p o w m

-

n * 2 ) ,

2 ) ) )

d ) 2 - 2 - 2 - 2 - n ) ) )

e ) s . s u b s t r 4 , 2 )

f) s. le ng th ) + t . le ng th )

(12 m arks)

QUESTION 2

If

the

var iab les

a, b, and c

( t y p e d o u b l e )

are 504,

3 0 2 . 5 5 8 , - 1 2 . 3 1 , respect ive ly . Wr i te

th e C++ state me nts tha t wi l l d isplay the fo l lowing l ine (for clarity, a _ deno tes a b lank

space) .

504 302.56 -1 2. 3

(3 marks)

QUESTION

3

Assuming x ( type do ub le ) is 1 2 . 3 3 5 and n (type i n t ) is 100. Show the outpu t lines for the

following statements. For clarity, use the underscore sym bol ( _ ) to denote a blank space .

cout <

<

<

<

cout <

cout <

<

<

< showpoint <<

< setprecision

< "\n x is "

< " n is " «

< "\n\n n is

< showpoint <<

< setprecision

< "\n x is "

fixed

(2)

<< setw

setw(4)

(6) «

<< n

« setw(2)

fixed

(1)

« setw(5) «

X

;

« n;

x;

(4 marks)

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7/23/2019 CSC425_7


CONF IDENTIAL 3 CS/APR 2007/CSC425

Q U E S T I O N 4

Write a C++ assignment statement to com pute each of the following:

a) The volume of sphere using the formula:

(2 marks)

b) Extract the last three digits of the integer st oc kn um be r and assign to p r i c e with a

decimal point before the last two digits, (e.g. if st oc kn um be r is 1 758 31 6, the last three

digits are 316, therefore, p r i c e is assigned the value of 3 .1 6)

(3 marks)

c) Calculate the area of a triangle using Hero s formula: area = ^(s - a)(s - b )(s - c)

(2 marks)

QUESTION 5

Write appropriate C ++ statement(s) for each of the following:

a) A certain city classifies a pollution index less than 35 as pleasant , 35 through 60 as

unpleasant , and above 60 as hazardous . Display the appropriate classification of a

number representing a pollution index.

(4 marks)

b) For each integer nu m in t with value 1 0, 1 1 , 1 2,1 3, 1 4 , and 1 5, display the symbols A,

B,C, D, E, and F, respectively.

(4 marks)

c) Display a list of points (x, y) on the graph of y = x

4

- 3x + 1 for x ranging from -2 to 2 in

steps of 0.2.

(4 marks)


7/23/2019 CSC425_7


CONFIDENTIAL

CS/APR 2007/CSC425

QUESTION 6

Referring to the fol lowing i f statement, assume that num is an i n t type:

if (fabs(num) <= 4)

i

(num

cout

else

cout

else

cout <<

> 0)

<< 2 *

« 2 *

num <<

num

num

is

+ 1 «

<< endl

out of

endl;

'•

range.\n ;

Wh at is the output produced from the above statement if:

a ) n um i s - 9

b) num is 0

c) num is 3

(6 marks)

QUESTION 7

Referring to the following program segm ent, answer the questions that follow.

cout << \nEnter an integer: ;

cin >> n;

product = n;

count = 0;

while (count

cout «

product

++count;

< 4)

\nproduct is << product;

*= n;

a) What output values are displayed by the above program segment for each of the

following data value entered?

(i) 5

(ii) 6

(iii) 7

(6 marks)

b) In gene ral, for a data value of any number n, what does this loop display?

(3 marks)

c) Rewrite the above program segment by replacing the w h i l e loop with the f o r loop that

will produce the same output.

(3 marks)

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CONFIDENTIAL

7/23/2019 CSC425_7


CONFIDENTIAL CS/APR 2007/CSC425

QUESTION 8

Assu ming that the array nums [ ] is initially as shown be low.

n u m s [ ]

35 50

17 109

88

[ 2 ;

[ 4 ]

Show the contents of the array elements after each of the following program segments is

executed.

a)

b)

temp = nums[0];

nums[0] = nums[2];

nums[2] = temp;

nums

[o ;

[ 1 ]

[ 2 ]

[ 4 ]

(3 marks)

temp

for

=

(i

nums

nums

[4]

nums[0];

= 1; i < 3; ++

[i] = nums[i +

= temp;

i)

l

nums

[ 2 ;

[ 4 ]

(5 marks)

© Hak Cipta Universiti Teknologi M ARA

CONFIDENTIAL

7/23/2019 CSC425_7


CONFIDENTIAL

CS/APR 2007/CSC425

QUESTION 9

The array monthName [ ] holds the following three-character strings.

m o n t h N a m e [ ]

Jan

Feb Mar

Apr

May Jun

Jul

Aug Sep

Oct

Nov

Dec

[ 0 ] [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] [ 9 ] [ 1 0 ] [ 1 1 ]

a) If integer n is 3, wha t is displayed by the following statem ent?

cout << monthName[++n] << and << monthName[n + 3 ] ;

(3 marks)

b) Wha t value is assigned to string variable w in te rM o n th s by the following statement?

w i n t e r M o n t h s = m o n t h N a m e [ 1 1 ] + , + m o n t h N a m e [ 0 ] + ,

+ m o n t h N a m e [ 1 ] ;

(3 marks)

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CONFIDENTIAL 7 CS/APR 2007/CSC425

PAR TB 30 MARKS)

QUESTION 1

Write a program that calculates and displays values for y when

y = xz(x - z)

Your program should calculate y for values of x ranging between l and 5 and values of z

ranging between 2 and 6. The x variable should control the outer loop and be incremented

in steps of 1 and z should be incremented in steps of l . Your program should also display

the message F u n c t i o n U n de f in e d when the x and y values are equal . The output of

your program should look like the following. (Note: you are required to use programmer-

defined functions in your program)

1.0

1.0

1.0

2.0

2.0

2.0

2.0

3.0

4.0

2.0

3.0

4.0

-2.000

-1.500

-1.333

Function Undefined

-6.000

-4.000

(15 m arks)

QUESTION 2

The expansion of a steel bridge as it is heated to a final Celsius temperature, T

F

from an

initial Celsius temperature, T

o

can be approximated using the formula

Increase in length = a * L* (T

F

-T

o

)

where a is a coefficient of expansion (which for steel is 11.7 e-6) and L is the length of a

bridge at temperature

T

o

.

Using this formula, write a C++ program that displays a table of

expansion lengths for a steel bridge that is 7365 meters long at 0 degrees Celsius, as the

temperature increases to 40 degrees in 5 degree increments. (Note: you are required to

use programmer-defined functions in your program)

(15 m arks)

END OF QUESTION PAPER


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