Developing Software Solutions

 

 

 

 

 

 

 

 

 

 

 

Programming in Code

 

READ THE PROBLEM

DEFINE THE PROBLEM

DEVELOP ALGORITHM IN FLOWCHART

"CODE" INSTRUCTIONS FOR A CALCULATOR

 

 

 

 

TASK 1.1 (example)

Solve the equation

 

Step 1

 

Ø      Recognise reciprocals

Ø      Work out reciprocals 1/6 and 1/3

Ø      Add reciprocals

Ø      Get reciprocal

 

 

 

Step 2

 

see flowchart

 

 

Step 3

 

THE CODE (INSTRUCTIONS)

 

 

Step 4

TEST (AND DEBUG)

Press buttons on calculator....do you get answer "2"

 

Step 5

DOCUMENT

"The solution to    can be worked out on a calculator by pressing the following keys."

 

 

 

Task 1.1 Flowchart

 

 

 

 

TASK 1.2 (exercise)

Solve the equation

Step 1

 

 

 

 

 

 

 

 

 

 

 

 

 

Step 2

see flowchart

 

Step 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Step 4

 

 

 

 

 

Step 5

 

 

 

 

 

Task 1.2 Flowchart

 

 

 

TASK 1.3 (exercise)

Solve the equation for R

   when given values R₁, R₂, R₃

Step 1

 

Recognise that values need to be entered.

 

 

 

 

 

 

 

 

 

 

 

Step 2

see flowchart

 

Step 3

 

 

 

 

 

 

 

 

 

 

 

Step 4

Test with values 6, 3 and 2.

 

 

 

 

 

 

Step 5

 

 

 

 

Task 1.3 Flowchart

 

 

 

TASK 1.4 (exercise)

Solve the equation for R

when given values R₁, R₂, R₃,R₄

Step 1

 

Recognise that values need to be entered.

Recognise that some processes are repeated.

 

 

 

 

 

 

 

 

 

Step 2

see flowchart

 

Step 3

 

 

 

 

 

 

 

 

 

 

 

Step 4

 

 

 

 

 

 

Step 5

 

 

 

 

 

 

Task 1.4 Flowchart

 

 

TASK 1.5(exercise)

Solve the equation for R

when given values R₁, R₂, R₃,R₄.....R_N

Step 1

Recognise that the number of values must be entered

Recognise that values need to be entered.

Recognise that some processes are repeated.

 

 

 

 

 

 

 

Step 2

see flowchart

 

Step 3

 

 

 

 

 

 

 

 

 

 

 

 

 

Step 4

 

 

 

 

 

Step 5

 

 

 

 

 

 

 

 

Task 1.5 Flowchart

 

Modify this flowchart to include a test for a zero entry.

A zero entry can be used to end the program.

Modify the flowchart so that the algorithm automatically counts the number of values.

 

 

Simple Pascal Programs

 

These Pascal programs relate to Task 1.1

 

PROGRAM TASK_1 ;

CONST

            R1=6.0;

            R2=3.0;

VAR

            S,S1,S2,R:real;

BEGIN

            S1:=1/R1;

            S2:=1/R2;

            S:=S1+S2;

            R:=1/ST;

            Writeln(R:3);

END.

 

This is not the only program that will do the task.

 

PROGRAM TASK_1a;

 

CONST

            R1=6.0;

            R2=3.0;

VAR

            R:real;

 

BEGIN

            R:=1/(1/R1+1/R2);

            Writeln(R:3);

END.

 

 

 

 

Exercise 1.6

 

Write a Pascal Program for Task 1.2. It is to be handwritten on A4 paper.

 

 

 

This is due on 14^th February