Tutorial 22 - Java 2 (Sequence)

** This tutorial contains Assessable Tutorial E **

This tutorial is in the Unix lab.

Question 1

Write a Java program for the following. Use the pseudo code and data dictionary shown below. (This problem is from question 2 in tutorial 6)

Problem Description

An athlete is interested in their average speed over a distance. The user is to input the distance (in km) and time taken (in seconds) and the average speed in kilometres per hour is to be displayed. Hint: to calculate the speed, first convert the seconds to hours, then divide the distance by the time taken.

Example Runs

Run
Distance (km) ?  15
Time taken (sec) ? 3600
Average speed = 15kph

Run
Distance (km) ?  5
Time taken (sec) ? 1500
Average speed = 12kph

Pseudo Code

calcAverageSpeed
    Input distance, timeInSeconds
    timeInHours = timeInSeconds / 3600
    averageSpeed = distance / timeInHours
    Display averageSpeed
STOP

Data Dictionary

Note: beware of integer division when calculating the time in hours. Dividing  by 3600.0 (a double) rather than 3600 (an int) ensures that floating pint division occurs.

Question 2

Write a Java program that allows the user to input two integers, then calculates and displays result of integer division and the modulus of the two numbers.

Example

Run
Numerator ? 9
Denominator ? 4

Integer Division of 9 / 4 = 2
Modulus of 9 / 4 = 1

Question 3

Copy question 2, and change it to use doubles rather than integers.

Run
Numerator ? 9
Denominator ? 4

Floating Point Division of 9 / 4 = 2.25
Modulus of 9 / 4 = 1

Assessable Tutorial E

Due Date: Tutorial 24
Marks: 2%

Question 1 above is Assessable Tutorial E. Hand in a title page as specified in Assessable Tutorial A, and a printout of the code for question 1 .