Lab 2

Hi everyone! Today is our programming class. Lets begin!
For today task is for problem solving in java program. For today lesson, we will be able to trace a program, designing solution to a problem using Problem Analysis Chart(PAC) and Input Process Output Chart (IPO). Besides, we also can write, compile and run a simple computer program based on IPO.

For the first question, I need to trace the following programs and show their output.

Question 1(a) :

Answer :

Question 1(b) :

Answer : 

Question 1(c) :

Answer : 

Question 1(d) :

Answer :

For the question 2, i spot any error in the classes Average and/or FahrenheitToCelsius and i already correct it and here is the answer.

Classes Average :

Classess FahrenheitToCelsius :

Next for the question 3, I need to round up the code in line 6 to two decimal places. The answer is , 

Next, for the question 4, I need to write a program that declares variables and assign values from a user for each data type available in Java and print them out. 

Here is the data type that I choose,

i) Boolean

ii) Byte

iii) Char

iv) Double

Question 5 :

Answer :

PAC

Data	Processing	Output
Amount of money	Ringgit = (int) amount; Sen = (Amount – Ringgit) * 100	Amount of money in Ringgit Amount of money in Sen

IPO

Data	Processing	Output
Amount of money	Get amount from user input. Ringgit = (int) amount; Sen = (Amount – Ringgit) * 100	Amount of money in Ringgit Amount of money in Sen

Algorithm :

1. Get the amount from user

2. Covert the amount into Ringgit and Sen by using the following formula:

Ringgit = (int) amount;

Sen = (amount – Ringgit) * 100

3. Display the amount in Ringgit and Sen

Java program :

Question 6 : 

Answer :

PAC

DATA	PROCESSING	OUTPUT
Weight in pounds Height in inches	Convert weight in pounds to weight in kilograms Convert height in inches to height in meters Weight = weight in pounds * 0.45359237 kg Height = height in inches * 0.0254 meter Compute BMI BMI = weight / height2	Display BMI

IPO

DATA	PROCESSING	OUTPUT
Weight in pounds Height in inches	Get value of weight and height from user input. Convert weight in pounds to weight in kilograms Convert height in inches to height in meters Weight = weight in pounds * 0.45359237 kg Height = height in inches * 0.0254 meter Compute BMI BMI = weight / height2	Display BMI

ALGORITHM:

1.       Get value of weight and height from user input.

2.       Convert weight in pounds to weight in kilograms  by using the following formula:

                Weight = weight in pounds * 0.45359237 kg

3.       Convert height in inches to height in meters by using the following formula:

               Height = height in inches * 0.0254 meter

4.       Display the BMI.

Java program :

That's all for Lab 2. This questions is quite challenging for me and it makes me feel excited to learn more. 

Bye! Thank you for reading my blog.

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