BASICS OF COMPUTER PROGRAMMING-TAKE HOME ASSIGNMENT 2018

SOKOINE UNIVERSITY OF AGRICULTURE
COLLEGE OF AGRICULTURE
DEPARTMENT OF ENGINEERING SCIENCE AND TECHNOLOGY
AE 219
BASICS OF COMPUTER PROGRAMMING
GROUP 09-ASSIGNMENT, IWRE 2
NO. NAME OF A STUDENT REGISTRATION NUMBER SIGNATURE
1. DOTO, MUSA GESE IWR/D/2016/0011
2. KOYI, PERIS J IWR/D/2016/0021
3. KWEKA, DANIEL IWR/D/2016/0023
4. DAUDI, DERICK IWR/D/2016/0009
5. KILINDO, ABUBAKARI IWR/D/2016/0065
INSTRUCTOR: DR. BAANDA A. SALIM
SUBMISSION DATE: FRIDAY ,29TH
JUNE 2018

PART 1
TP- Lecture 4.1
Self- Check 1
Which of the following are Pascal reserved words, standard identifiers, valid identifiers, invalid
identifiers?
end ReadLn Bill
program Sues‟s Rate
Start begin const
Y=Z Prog#2 &Up
First Name „MaxScores‟ A*B
CostaMesa,CA Barnes&Noble CONST
XYZ123 ThisIsALongOne 123XYZANSWER
ANSWERS
Paschal reserved words:
begin, end, program, Start, CONST, const
Standard identifiers:
ReadLn, „MaxScores‟, Bill, Rate
Valid identifiers:
XYZ123, ThisIsALongOne, A*B, Y=Z, CostaMesa, CA, First Name
Invalid identifiers:
123XYZ, Sues‟s, &UpFirstName, Barnes&Noble, Prog#2
Self- Check 2
Which of the following literal values are legal and what are their types? Which are illegal and
why?
15 „XYZ‟ „*‟
$25.123 15; -999
.123 „x‟ “X”
„9‟ „-5‟ True

ANSWER:
The following values are legal and their type
Legal Type Illegal
15 Integer literal $25.123
„
XYZ‟ String Literal .123
„X‟ Character Literal „9‟
True Boolean Literal 15;
-999 Integer Literal -„5‟
Operator literal „*‟
TP- Lecture 4.2
Self- Checked 1
Which of the following are valid program headings? Which are invalid and why?
(i) Program program; - INVALID using reserved ID
(ii) program 2ndCourseInCS; -INVALID because starts with digit
(iii) program PascalIsFun;- VALID program heading
(iv) program Rainy Day; -INVALID – contains space
Self- Checked 2
Rewrite the following code so that it has no syntax errors and follows the writing conventions we
adopted
(i) Program SMALL;
VAR X, Y, Z : real;
BEGIN
Y := 15.0;
Z := -Y + 3.5;
X :=Y + z;
writeln (x, Y, z);
END.
ANSWER:
Program SMALL;
VAR
X, Y, Z :real;
BEGIN
Y := 15.0;
Z := -Y + 3.5;
x := Y + z;
writeln (x, Y, z);
END.

(ii) PROGRM 2time5 {input,output};
CONST two := 2; five := 5;
VAR multip; dummy ; integer;
BEGIN ;
multip = two * five ; dummy := multip ;
write (two) , write (five)
END ;
ANSWER:
PROGRAM p2time5(INPUT,OUTPUT);
CONST
two = 2;
five = 5;
VAR
multip, dummy :integer;
BEGIN
multip := two * five ;
dummy := multip ;
write (dummy)
END .
Self- Check 3
Write the following numbers in normal decimal notation:
(i) 103E-4 = 0.0103
(ii) 1.2345E+6 = 1234500000.0
(iii) 123.45E+3 = 123450.0
Self-Check 4
Write the following numbers in Pascal scientific notation
(i) 1300= 1.3E+3
(ii) 123.45= 1.2345E+2
(iii) 0.00426= 4.26E-3
TP- Lecture 5.1
Self- Checked 1
What are the results of the following expressions?
22 div 7 = 3
7 div 22 = 0
22 mod 7 =1
7 mod 22 = 7

Self- Checked 2
What is valid & what is invalid in the following
const PI = 3.14159;
MaxI = 1000;
var
X, Y : Real;
A, B, I : Integer;
. . .
I := A mod B; I := A mod Y;
X := A / B; I := A / B; X := A / Y;
I := B div 0; I := A mod 0; X := PI div Y;
X := A mod (A / B);
I := (MaxI - 990) div A;
I := A mod (MaxI - 990);
SEE TURBO PASCAL COMPILATION ERRORS
ANSWER:
PROGRAM Types;
CONST PI = 3.14159;
MaxI = 1000;
VAR
X, Y : Real;
A, B, I : Integer;
BEGIN
I := A mod B;{ I := A mod Y; }
X := A / B; { I := A / B; }
X := A / Y; { I := B div 0; }
I := A mod 0; { X := PI div Y; }{ X := A mod (A / B); }
I := (MaxI - 990) div A;
I := A mod (MaxI - 990);
END.
TP- Lecture 5.2
Self- Checked 1:
What is the output if the entered data are 5 7?
writeln („Enter two integers>‟);
readln(M, N);
M := M + 5;
N := 3 + N;
writeln („M = „, M);
writeln („N = „, N);

ANSWER:
The output of the program is
Enter two intergers>5 7
M= 10
N= 10
Self- Checked 2:
What is the output of this code?
write („My name is‟);
writeln („Doe, Jane‟);
writeln ;
write(„I live in „);
write(„Ann Arbor, MI‟);
writeln („and my zip code is „, 48109);
ANSWER:
The output of this code will be,
My name is Doe, Jane
I live in Ann Arbor, MIA
and my zip code is 48109
Self- Checked 3:
Show how the value -15.564 (stored in X) would be displayed using the following formats
(i) X :8:4= -15.5640
(ii) X:8:3 = -15.564
(iii) X:8:1 = -15.6
(iv) X:8:0 = -16.0
(v) X:8 = -15
Self- Checked 4:
Assuming X = 12.345 (type Real) and I = 100 (type Integer). What will the output of the
following statements look like?
writeln(„X is „ :10, X :6:2, „I is „ :4, I :5);
write(„I is „ :10, I : 1);
writeln(„X is „ :10, X :2:1);

ANSWER:
The output will be as follows
X is 12.35 I is 100
I is 100 X is 12.4
TP- Lecture 8
Self- Checked 1:
(i) Write the Boolean expression to check if a character variable Ch is a digit.
ANSWER:
(ORD(InputChar) > 47) AND (ORD(InputChar) < 58)
(ii) Write a Boolean expression to check if a character variable Chis an upper-case letter.
ANSWER:
(ORD(InputChar) > 64 ) AND (ORD(InputChar) < 91)
iii. Write a Boolean expression to check if a character variable Ch is a lower-case letter.
ANSWER:
(ORD(InputChar) > 96 ) AND (ORD(InputChar) < 123)
iv. Using a Boolean test, convert upper-case character Ch to a lower-case character.
ANSWER:
IF Upper-case THEN
Name[I] := CHR(ORD(Name[I])+32);
Self- Check 2:
Write Boolean assignment statements:
1. Assign true to variable Between if the value of N is in the range -K to +K, inclusive;
otherwise, assign a value of false
ANSWER:
Boolean assignment statement is,
IF (N <= -k) AND (N <=+k)
WRITELN(„This is True‟)
ELSE
WRITELN(„This is False‟)

(a) Assign a value of true to variable Uppercase if Ch is an uppercase letter;
otherwise, assign false
ANSWER:
Boolean statement is,
IF M DivN THEN
WRITELN („This is True‟)
ELSE
WRITELN(„This is False)
(b) Assign a value of true to variable Divisor if M is a divisor of N; otherwise,
assign false
ANSWER:
Boolean statement is,
IF (ORD(InputChar) > 64 ) AND (ORD(InputChar) <
91) THEN
WRITELN(„This is True‟)
ELSE
WRITELN(„This is False‟)
Self- Check 3:
What do these statements display?
(i) IF 12 < 12 THEN
writeln(„Less‟)
ELSE
writeln(„Not less‟)
ANSWER:
It will display,
Not less
(ii) Var1 := 25.12;
Var2 := 15.00;
IF Var1
(iii) <= Var2 THEN
writeln(„Less or equal‟)
ELSE
writeln(„Greater than‟)
ANSWER:
It will display, Greater than

Self- Check 4:
What value is assigned to X when Y is 15.0?
a. X := 25.0;
IF Y <> (X - 10.0) THEN
X := X - 10.0
ELSE
X := X / 2.0
ANSWER: The value assigned to X is 12.5
b. IF (Y < 15.0) AND (Y >= 0.0) THEN
X := 5 * Y
ELSE
X := 2 * Y
c. ANSWER
The value assigned to X is 30.0
Self- checked 5:
Write Pascal statements to perform the following:
If Item is nonzero, then multiply Product by Item and save the result
in Product; otherwise, skip the multiplication. In either case, print the
value of Product.
Store the absolute difference of X and Y in Y, where the absolute
difference is (X - Y) or
(Y - X), whichever is positive.
Don’t use the abs() function in your solution
ANSWER:
IF item <> 0 THEN
Multip = product*item
WRITELN;
WRITELN(„Product‟)
Self-Check 6:
Evaluate the following expressions, with and without short-circuit evaluation
-Assumptions:
i. X = 6
ii. Y = 7
-(X > 5) and (Y div X <= 10)
-(X <= 10) or (X / (Y - 7) > 3)

ANSWER:
With short circuit
X = 6
Y = 7
IF (X >5) AND (YdivX<=10)
IF(X<= 10) OR (X/(Y-7)>3)
Without shot circuit-evaluation
X = 6
Y = 7
IF (X > 5) THEN
(Y divX<= 10)
IF (X <= 10) THEN
(X/(Y-7) > 3)
TP-Lecture 9
Self- Checked 5.1:
Trace the following program fragment:
J := 10;
FOR I := 1 to 5 DO
BEGIN
writeln(I, J);
J := J - 2
END; { FOR }
• How many times will the loop body be executed?
ANSWER:
The loop body will be executed 5 times.
Self- Checked 5.2
(a) Write FOR loop headers that process all values of Celsius (type integer) in the following
ranges:
-10 through +10
100 through 1
15 through 50
50 through -75
(b) What types can be used as FOR loop counters?

(c) Write a FOR statement that computes the sum of the ODD integers in the range 0 to
100 inclusive
ANSWER:
FOR Celcius := -10 TO 10 DO
FOR Celcius := 100 DOWN TO 1 DO
FOR Celcius := 15 TO 50 DO
FOR Celcius := 50 DOWN TO -75DO
Self- Check 5.3:
For the following loop:
X := 3;
Count := 0;
while Count < 3 do
begin
X := X * X;
writeln(X);
Count := Count + 1
end; { while }
writeln(Count);
• How many times is the loop body repeated?
• What is printed during each repetition of the loop body, and at the very end?
• What happens if the last statement in the loop body is: Count := Count + 2;
• What happens if the last statement in the loop body is removed?
ANSWER:
The time that the loop body repeated are 3 time
The result which can be printed during each repeation of the
loop is 0
When the last statement in the loop is count:= count+2 =215
can be printed
When the last statement in the loop body is removed Nothing
will be printed
Self-Checked 5.10:
(i) Write a while loop that displays each integer from 1 to 5 on a separate line, along with its
square.
(ii) Write a while loop that displays each integer from 4 down to -6 on a separate line. Display
the values in the sequence 4, 2, 0, and so on.

ANSWER
NOT(X <= Y) OR (X <> 15)
NOT(X <= Y) AND (Z = 7.5)
NOT(X <> 15) AND (Z = 7.5)
NOT Flag AND (X <> 15.7)32
Flag OR NOT (x <= 8)
TP- Lecture 11.1
Self- Checked 1:
What is displayed by the following program fragment, assuming N is 5?
FOR I := 1 TO N DO
BEGIN
FOR J := 1 TO I DO
write(„*‟);
writeln
END;
ANSWER:
- The display that the program can produce are
*
* *
* * *
* * * *
* * * * *
Self- Checked 2 :
What is displayed by the following program fragment, assuming
M is 3 and N is 5?
FOR I := N DOWNTO 1 DO
BEGIN
FOR J := M DOWNTO 1 DO
write(„*‟);
writeLn
END;

ANSWER:
The display that the program can execute are
* * *
* * *
* * *
* * *
Self-checked 3:
Show the output printed by the following nested loops:
FOR I := 1 TO 2 DO
BEGIN
writeln(„Outer‟ : 5, I : 5);
FOR J := 1 TO 3 DO
writeln(„Inner‟ : 7, I : 3, J : 3)
FOR K := 2 DOWNTO 1 DO
writeln(„Inner‟ :7, I : 3, K : 3)
END;
ANSWER:
 The output that can be printed in the nested loop are
OUTPUT 1
Inner 1 1
Inner 1 2
Inner 1 3
Inner 1 2
Inner 1 1
OUTPUT 2
Inner 2 1
Inner 2 2
Inner 2 3
Inner 2 2
Inner 2 1
Self- Check 4:
Write a program fragment that, given an input value N, displays N rows in the form 1 2 ... N, 2 3
... N + 1, and so forth
PROGRAM Check;
VAR I,J,N : integer;
BEGIN
write('What is N? ');
read(N);
FOR I := 1 TO N DO
BEGIN
FOR J := I TO I + N - 1 DO
write(J:2);

writeln
END;
readln
END.
ANSWER:
PROGRAM Fragment(INPUT,OUTPUT);
VAR
J, I, N :INTEGER;
BEGIN
WRITE(„Enter the value of N‟);
READLN(N);
FOR
I := 1 TO N DO
BEGIN
FOR J := I TO I +N-1 DO
WRITE(J : 2)
WRITELN;
READLN
END.
Self- Check 5:
Write a program that prints a nicely labeled multiplication table for the digits 1 through 9.
ANSWER:
PROGRAM MultiplicationTable;
VAR I,J : integer;
BEGIN
FOR I := 1 TO 9 DO
BEGIN
FOR J := 1 TO 9 DO
write(I*J:3);
writeln
END;
readln
END.

The outputs of the program are
1 2 3 4 5 6 7 8 9
2 4 6 8 10 12 14 16 18
3 6 9 12 15 18 21 24 27
4 8 12 16 20 24 28 32 36
5 10 15 20 25 30 35 40 45
6 12 18 24 30 36 42 48 54
7 14 21 28 35 42 49 56 63
8 16 24 32 40 48 56 64 72
9 18 27 36 45 54 63 72 81
TP- Lecture 12.2
Self- Check 1:
What is wrong with this program?
assign(„MyData.txt‟, InFile);
rewrite(Infile); /* ?? */
reset(Infile);
WHILE NOT eoln DO /* ?? */
BEGIN
read(InFile, Next);
write(Next)
END; {while}
ANSWER:
The wrong of this statement can be corrected as
PROGRAM Self(OUTPUT);
VAR
InFile : TEXT;

BEGIN
Assign(InFile, „MyData.Txt‟);
Rewrite(InFile);
WHILE NOT eoln (inFile) DO
BEGIN
WRITE( Next);
READLN(Infile,Next);
END; {WHILE};
READLN;
Reset(InFile)
END.
PART II.
QUESTION 1
In the following program, two integers, a and b, are declared in the declaration part, then
assigned integer values in the program block. The WRITELN statement is then used to evaluate
and display the results of different arithmetic operations performed on those variables.
PROGRAM Arithmetic(OUTPUT);
{ Variable Declarations }
VAR
a, b :INTEGER;
{ Program Block }
BEGIN
a := 50;
b := 4;
WRITELN('a=',a);
WRITELN('b=',b);
WRITELN('a+b=',a+b);
WRITELN('a-b=',a-b);
WRITELN('a*b=',a*b);
WRITELN('a/b=',a/b);
WRITELN('a div b=',a DIV b); { used with integers only }
WRITELN('a mod b=',a MOD b) { used with integers only }
END.
ANSWER
To write output of the program:
a=50

b=4
a+b=54
a-b=46
a*b=200
a/b= 1.2500000000000000E+0001
a div b=12
a mod b=2
QUESTION 2
Write a program to calculate employee wages according to the formula: Wages :=HoursWorked
* PayRate; inputHoursWorked and PayRate from the keyboard and display Wages preceded by
the string ‘USD’.
ANSWER
PROGRAM Payroll(INPUT,OUTPUT);
VAR
HoursWorked, PayRate, Wages :REAL;
{ Program Block }
BEGIN
WRITE('Please enter hours worked: ');
READLN(HoursWorked);
WRITE('Please enter pay rate: ');
READLN(PayRate);
Wages :=HoursWorked * PayRate;
WRITELN;
WRITELN('Wages = $', Wages:0:2)
END.
QUESTION 3
Write the Pascal expressions for the following:
i. The quadratic equation: Ax2
+ Bx + C
ii. The determinant: B2 – 4AC
iii. The square root of the determinant
iv. The absolute value of the determinant
Then, write a program to produce the roots of the equation according to the input values
of A, B, and C. Use test values for A, B, and C that give real roots. Typical values
are:
A=1, B=2, C=1, give the solution: X1= X2= –1.00
A=1, B=4, C=2, give the solution: X1= –0.59, X2= –3.41

ANSWERS
i. A*SQR(X)+B*X+C
ii. SQR(B)-4*A*C
iii. SQRT((SQR(B)-4*A*C))
iv ABS(SQR(B)-4*A*C)
PROGRAM Quadratic(INPUT,OUTPUT);
VAR
D, X1, X2 :REAL;
A, B, C: INTEGER;
BEGIN
WRITE('Enter the values of A,B and C for the quadratic
equation:');
READLN(A,B,C);
{ Determinant}
D:=SQR(B)-4.0*A*C;
{ Roots }
X1:=(-B+SQRT(D))/(2*A);
X2:=(-B-SQRT(D))/(2*A);
WRITELN('X1=',X1:2:2,' X2=',X2:2:2);
WRITELN('Press ENTER to continue...');
READLN
END.
Sample runs:
A=1, B=2, C=1
X1=X2=-1.00
A=1, B=4, C=2
X1= -0.59
X2= -3.41
QUESTION 4
Modify the program you wrote in Qn3 to solve a quadratic equation (Ax² + Bx +C) for both real
and imaginary roots.
ANSWER
Modified Complete Solution of a Quadratic Equation will be:
PROGRAM Quadratic2(INPUT,OUTPUT);
VAR
A, B, C, D, X1, X2 :REAL;
BEGIN
WRITE('Enter the values of A,B,C separated by spaces:');
READLN(A,B,C);
{ Determinant}
D:=SQR(B)-4.0*A*C;
IF D < 0 THEN
BEGIN
WRITELN('Roots are imaginary.');
WRITELN('X1=',-B/(2*A):0:2,'+j',SQRT(ABS(D))/(2*A):0:2);
WRITELN('X2=',-B/(2*A):0:2,'-j',SQRT(ABS(D))/(2*A):0:2)

END
ELSE
BEGIN
WRITELN('Roots are real.');
WRITELN('X1=',(-B+SQRT(D))/(2*A):0:2);
WRITELN('X2=',(-B-SQRT(D))/(2*A):0:2)
END;
WRITELN('Press ENTER to continue ...');
READLN
END.
{ Sample runs:
Real roots:
A=2, B=4, C=1
X1=0.29
X2=1.70
Equal real roots:
A=1, B=2, C=1
X1=-1
X2=-1
Imaginary roots:
A=1, B=1,C=1
X1=-0.5+j0.87
X2=-0.5-j0.87
QUESTION 5
Write a program to describe the weather according to the following temperature classifications:
Temperature Classification
24 and greater Hot
10 to 23 Cool
0 to 9 Cold
less than 0 Freezing
ANSWER
PROGRAM WeatherTester(INPUT,OUTPUT);
VAR
Temperature :INTEGER;
Hot, Cool, Cold, Freezing :BOOLEAN;
BEGIN
WRITE('Please enter the temperature:');
READLN(Temperature);
Hot := (Temperature >= 24);
Cool := (Temperature >= 10) AND (Temperature < 24);
Cold := (Temperature >= 0) AND (Temperature < 10);
Freezing := (Temperature < 0);
WRITELN;
{ Beginning of the IF construct }
IF Hot THEN
WRITELN('IT‟S VERY HOT!!!')
ELSE IF Cool THEN
WRITELN('IT‟S COOL OUT THERE!!!!!.')

ELSE IF Cold THEN
WRITELN('Oh, it is cold. ')
ELSE IF Freezing THEN
WRITELN(' It is freezing.')
ELSE
WRITELN('Hey, It is below the normal temperature!');
{ End of the IF construct }
{ ----------------------- }
WRITELN('Press ENTER to continue..');
READLN
END.
QUESTION 6
The number 2 and its powers are very important numbers in the computer field. Some of the
numbers, such as 1024 bytes (equivalent to 1 KB) and 65,536 bytes (64 KB) are commonly used.
In the following program a FOR loop is used to display the powers of two, using the same logic
that was used to calculate the power in Example 2-2. The program output gives the power and the
number 2 raised to this power. The initial and final values of the counter are supplied by the user
during the execution. Thus, you can determine the range of numbers you would like to examine.
PROGRAM ForLoop(INPUT, OUTPUT);
VAR
Base, Power, Start, Final :INTEGER;
BEGIN
Base := 2;
WRITE('Enter starting exponent:');
READLN(Start);
WRITE('Enter ending exponent:');
READLN(Final);
WRITELN;
WRITELN('Number Power of two');
FOR Power := Start TO Final DO
BEGIN
WRITE(Power:3);
WRITELN(EXP(LN(Base)*Power):20:0)
END;
WRITELN;
READLN
END.
Modify the program to save the output of the program in file (instead of seeing the output in the
screen). Plot the data of the output file (using Matlab or Excel). Label your plot. Use exponent
value from 1 to 30.

ANSWER
The following is a sample run using exponent values from 1 to 30:
Enter starting exponent:1
Enter ending exponent:30
Number Power of two
1 2
2 4
3 8
4 16
5 32
6 64
7 128
8 256
9 512
10 1024
11 2048
12 4096
13 8192
14 16384
15 32768
16 65536
17 131072
18 262144
19 524288
20 1048576
21 2097152
22 4194304
23 8388608
24 16777216
25 33554432
26 67108864
27 13417728
28 268435456
29 536870912
30 1073741824
Press ENTER to continue..
By using MatLab

QUESTION 7
Write down the output of the following program for a sample run of 10 elements
PROGRAM AverageProg3(INPUT,OUTPUT);
VAR
Average, Sum, Number :REAL;
Kounter :INTEGER;
BEGIN
Sum := 0;
Average := 0;
Number := 0;
Kounter := 0;
WHILE Number<>-1 DO
BEGIN
Kounter :=Kounter + 1;
Sum := Sum + Number;
WRITE('Enter element #',Kounter,' (or –1 to end): ');
READLN(Number)
END;
IF Kounter> 1 THEN
Average := Sum / (Kounter - 1);
WRITELN;
WRITELN('Sum of Numbers = ', Sum:0:2);
WRITELN('Average of Numbers = ', Average:0:2);
WRITELN;
READLN
END.

ANSWER
The following is a sample run of 10 elements:
Enter element #1 (or -1 to end): 1
Enter element #10 (or -1 to end): -1
Sum of the numbers =45.00
Average of Numbers = 5.00
Press ENTER to continue…
QUESTION 8
Write the output of the program below for the following sample run:
Enter score for class #1: 90.5
PROGRAM Scores2(INPUT,OUTPUT);
CONST
NumberOfClasses = 6;
Tab = ' '; { 9 spaces }
VAR
Score :ARRAY[1..NumberOfClasses] OF REAL;
Average, SumOfScores :REAL;
Index :INTEGER;
BEGIN
{ Read the scores array }
{ --------------------- }
FOR Index := 1 TO NumberOfClasses DO
BEGIN
WRITE('Enter score for class #', Index,': ');
READLN(Score[Index])
END;
{ Calculate the sum }
{ ----------------- }
SumOfScores := 0;
SumOfScores :=SumOfScores + Score[Index];
{ Calculate the average }
{ --------------------- }
Average :=SumOfScores / NumberOfClasses;

{ Display Results }
{ --------------- }
WRITELN;
WRITELN(Tab,'CLASS #');
WRITE(' '); { 6 spaces }
WRITE(Index:7);
WRITELN;
WRITE(Tab);
WRITE('-------');
WRITELN;
WRITE('SCORES ');
WRITE(Score[Index]:7:2);
WRITELN;
WRITE(Tab);
WRITE('-------');
WRITELN;
WRITELN(Tab,'Sum of scores = ', SumOfScores:0:2);
WRITELN(Tab,'Average of scores = ', Average:0:2);
WRITELN;
READLN
END.
This is a sample run:
CLASS
1 2 3 4 5 6
------------------------------------------
SCORES 90.50 80.50 86.20 90.30 74.80 98.50
------------------------------------------
ANSWER
output of the program
Sum of scores = 520.80
Average of scores = 86.80
Press ENTER to continue…

QUESTION 9
Write a Pascal program to read and store the test scores of ten students, then display
the output as shown below:
Student # Score
-----------------------
1 90.00
2 88.00
3 91.00
4 78.00
5 75.00
6 65.00
7 70.00
8 67.00
9 80.00
10 95.00
-----------------------
Average score = 79.90
ANSWER
PROGRAM Scores4(INPUT,OUTPUT);
CONST
NumberOfStudents = 10;
Tab = ' '; { 18 spaces }
Dash = '-';
NumberOfDashes = 46;
VAR
Score :ARRAY[1..NumberOfStudents] OF REAL;
Average, SumOfScores :REAL;
Index :INTEGER;
BEGIN
{ Read the scores array }
{ --------------------- }
FOR Index := 1 TO NumberOfStudents DO
BEGIN
WRITE('Enter Score of Student #', Index,': ');
READLN(Score[Index])
END;
{ Calculate the average score }
{ --------------------------- }
SumOfScores := 0;
SumOfScores :=SumOfScores + Score[Index];
Average :=SumOfScores / NumberOfStudents;
{ Display Results }
{ --------------- }
WRITELN;
WRITE(Tab, 'Student #');
WRITE(Tab, 'Score');
WRITELN;
WRITE(Tab);
FOR Index := 1 TO NumberOfDashes DO

WRITE(Dash);
WRITELN;
WRITELN(Tab,Index:3,tab,Score[Index]:10:2);
WRITE(Tab);
FOR Index := 1 TO NumberOfDashes DO
WRITE(Dash);
WRITELN;
WRITELN(Tab,'Average score = ', Average:0:2);
WRITELN;
READLN
END.
QUESTION 10
Write the output of the program below for the following sample run:
Enter element #1: 44
Enter element #3: 8
Enter element #4: 1
Enter element #6: 3
PROGRAM Sorting(INPUT,OUTPUT);
CONST
ArraySize = 6;
TYPE
Range = 1..ArraySize;
NumbersArray = ARRAY[Range] OF INTEGER;
VAR
Numbers :NumbersArray;
{ ----------------- Read procedure --------------- }
PROCEDURE ReadNumbers(L: INTEGER; VAR R :NumbersArray);
VAR
I :INTEGER;
BEGIN
FOR I := 1 TO L DO
BEGIN
WRITE('Enter element #', I,': ');
READLN(R[I])
END
END;
{ ----------------- Sort procedure --------------- }
PROCEDURE SortNumbers(M: INTEGER; VAR S :NumbersArray);
VAR
I, J, Pot :INTEGER;
BEGIN
FOR I := 1 TO M-1 DO
FOR J := I+1 TO M DO
IF S[I] > S[J] THEN
BEGIN { Swap contents }

Pot := S[J];
S[J] := S[I];
S[I] := Pot
END
END;
{ ---------------- Print procedure --------------- }
PROCEDURE PrintNumbers(N: INTEGER; T :NumbersArray);
VAR
I :INTEGER;
BEGIN
WRITELN;
WRITE('The sorted array is: ');
FOR I := 1 TO N DO
WRITE(T[I],' ');
WRITELN;
END;
{ --------------- Main Program ------------------- }
BEGIN
ReadNumbers(ArraySize, Numbers);
SortNumbers(ArraySize, Numbers);
PrintNumbers(ArraySize, Numbers);
READLN
END.
ANSWER
Sample run:
Enter element #3: 8
Enter element #4: 1
Enter element #6: 3
Output of the program
The sorted array is: 1 38 22 44 667
Press ENTER to continue

BASICS OF COMPUTER PROGRAMMING-TAKE HOME ASSIGNMENT 2018

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