Question

1.The following pseudocode algorithm is used to calculate the average of two numbers. Perform a desk check on this algorithm assuming the firstValue is 12.5 and the secondValue is 7.5. You should use a table to show your answer.

L1: Program AverageCalculator;

L2: Data firstValue as float;

L3: Data SecondValue as float;

L4: Data average as float;

L5: Output “Enter the first Number”;

L6: Input firstValue;

L7: Output “Enter the second Number”;

L8: Input secondValue;

L9: average = (firstValue+secondValue)/2;

L10: Output “the average is “, average;

L11: End AverageCalculator;

2. Produce a truth table for the following

a) A AND B

b) A OR B

c) (A AND B) OR B

d) NOT ((A AND B) OR B)

3. The table below shows some rules used in a courier company to determine the cost of delivery of a package. The cost of delivery determined by the weight of the package entered by the user.

Weight (Kg)	Cost of Delivery ($) per kg
Less than 1	2
1 - 5	3
more than 5	4

Write a pseudocode algorithm that accepts a value for the weight as its input and displays the total cost of delivery for the package its output.

Answer 1

1. The following table can be used to desk check the algorithm

firstValue	secondValue	average
12.5	7.5

This algorithm correctly calculates the average.

2. The Truth Tables are as follows:

a)

A	B	A AND B
0	0	0
0	1	0
1	0	0
1	1	1

b)

A	B	A OR B
0	0	0
0	1	1
1	0	1
1	1	1

c)

A	B	A AND B	(A AND B) OR B
0	0	0	0
0	1	0	1
1	0	0	0
1	1	1	1

d)

A	B	A AND B	(A AND B) OR B	NOT ((A AND B) OR B)
0	0	0	0	1
0	1	0	1	0
1	0	0	0	1
1	1	1	1	0

3. The required pseudocode is:

costOfDelivery (weight):
if weight <1: return weight*2
else if weight<=5: return weight*3
else if weight>5: return weight*4