Component parts of a problem: inputs

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. Which one is an input to a system?

A A report printed on the screen

B A student types their name into a form

2. A greenhouse system measures the temperature. Where does this input come from?

A A printer

B A sensor

3. Which is an input to a program?

A A barcode scanned at a till

B A receipt printed for the customer

4. A program opens scores.txt and reads each line. What are those lines?

A Input from a file

B Output to a file

5. A school canteen system must work out the total cost of a meal. Which list shows only inputs?

A Item chosen, quantity entered

B Total cost, receipt printed

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1INPUT Name		AA siren and a flashing light are outputs. The inputs are the data going in, such as a reading from a motion sensor.
2READFILE("scores.txt", Line)		BTemp ← ReadSensor("temperature")
3An input can be a reading from a sensor, such as a temperature sensor in a greenhouse		CThese are outputs or results of processing, not inputs. Inputs are the raw data that goes in, such as each mark entered.
4Listing the inputs in a scenario: a quiz asks for a player name and an answer		DReads one line of data from a stored file into the variable Line
5Inputs: total score, average mark, grade		ETakes data typed in by the user and stores it in the variable Name
6Inputs for an alarm: siren sounds, light flashes		FINPUT PlayerName INPUT Answer

Definitions

input

Fill in the Blanks

Complete each line of code by filling in the missing parts.

OUTPUT "Enter your name" _____ Name

OPENFILE "scores.txt" FOR ____ READFILE "scores.txt", Line

OPENFILE "scores.txt" FOR READ ________ "scores.txt", Line

OUTPUT "Enter your age" INPUT ___

// A sensor reading is an _____ INPUT Temp

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A OUTPUT "Enter your name"

B Name ← INPUT

C OUTPUT "Hello ", Name

Question 2

A Total ← 0

B FOR Count ← 1 TO 3

C INPUT Mark

D Total ← Total + Marks

E NEXT Count

Question 3

A OPENFILE "scores.txt" FOR READ

B READFILE "scores.txt", Line

C OUTPUT Line

D CLOSE "scores.txt"

Question 4

A OPENFILE "temps.txt" FOR READ

B READFILE Temp, "temps.txt"

C CLOSEFILE "temps.txt"

Question 5

A DECLARE Barcode : STRING

B OUTPUT "Scan the item"

C INPUT Barcode : STRING

D OUTPUT Barcode

Answer Key

Component parts of a problem: inputs

Section A: Quick Questions

B — A student types their name into a form

B — A sensor

A — A barcode scanned at a till

A — Input from a file

A — Item chosen, quantity entered

Section B: Match the Pairs

INPUT Name → Takes data typed in by the user and stores it in the variable Name

READFILE("scores.txt", Line) → Reads one line of data from a stored file into the variable Line

An input can be a reading from a sensor, such as a temperature sensor in a greenhouse → Temp ← ReadSensor("temperature")

Listing the inputs in a scenario: a quiz asks for a player name and an answer → INPUT PlayerName INPUT Answer

Inputs: total score, average mark, grade → These are outputs or results of processing, not inputs. Inputs are the raw data that goes in, such as each mark entered.

Inputs for an alarm: siren sounds, light flashes → A siren and a flashing light are outputs. The inputs are the data going in, such as a reading from a motion sensor.

Section C: Definitions

input — Data that goes into a system from a user, a sensor or a file, such as a typed name, a temperature reading or a line read from a stored file.

Section D: Fill in the Blanks

OUTPUT "Enter your name"
INPUT Name

OPENFILE "scores.txt" FOR READ
READFILE "scores.txt", Line

OPENFILE "scores.txt" FOR READ
READFILE "scores.txt", Line

OUTPUT "Enter your age"
INPUT Age

// A sensor reading is an input
INPUT Temp

Section E: Spot the Error

B — INPUT is a keyword followed by the variable that stores the typed data. It is not a value to assign. It should be INPUT Name.

D — The value typed by the user is stored in Mark, so the variable Marks does not hold the input. It should be Total ← Total + Mark.

D — The Cambridge keyword for closing a file that was opened for reading input is CLOSEFILE, not CLOSE.

B — READFILE needs the file name first and then the variable that stores the data read in. It should be READFILE "temps.txt", Temp.

C — The data type belongs in the DECLARE statement. The INPUT line only names the variable that receives the scanned data. It should be INPUT Barcode.