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Exam Topics

Difference between computers and calculators

John creates a new device. It will compute the orbit of all the planets in the solar system simultaneously. Since it won’t do anything else, he hopes to one day make another machine that will compute the orbit of the stars in the Milky Way.

Is John’s current device a computer? a calculator?

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Exam Topics

Software, Hardware, and Media

Provide a simple definition for software.

What classification is a DVD?

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Exam Topics

Software: OS, apps, compilers

Describe the purpose of a compiler.

What differentiates the Operating System (OS) from an application (app)?

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Exam Topics

Language generations

Sort the following languages in order of generation, low to high:

English

MATLAB

Machine

Assembly

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Exam Topics

What piece of hardware is the basis for modern computers?

Why do say that computers work in "binary"?

Exam Topics

5-step Process:

Identify and describe the five steps for this problem:

I need a computer program that will compute the volume of any right regular prism with 10 sides or less.

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Exam Topics

Developing SolutionsI/O Diagrams5-Step Process

State the ProblemIdentify inputs & outputsManually solve the problemComputerize: Algorithm & codeTest, test, test!

SyntaxSemantics

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Exam Topics

Developing Solutions

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Exam Topics

Developing Solutions

Exam Topics

I/O Diagrams

Prepare an I/O diagram for the program desired:

I need a program to compute the time required to get to Mars and how much fuel is needed, assuming I leave six months from the day the program is run.

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Exam Topics

• Know variable and file naming constraints

• Understand the functions listed in the lecture notes [e.g. sin() , cos() , sind() , cosd() , sqrt() , etc] – know the difference between sin() and sind(), for example.

• What is ans?

• What does clear do?

• What about clc?

• How do you suppress default output? 12

Exam Topics

A data type is a category of information. The data type determines how information is stored in the computer and how it can be used.

• Integerswhole numbers

• Floatsnumbers with fractional portion

• Stringssequences of characters

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Exam Topics

Starting with MATLAB

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Exam Topics

Starting with MATLAB

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Exam Topics

I/O

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Exam Topics

Input and Output

The input() function

What is a "prompt"?

"Collecting the return value"

Strings vs. Numbers

The disp() function

Exam Topics

The input function:Provide the MATLAB code that will use the input() function to obtain from the user the cost (in dollars) for an item, storing the information in the variable cost_per_item.

Provide the MATLAB code that will use the input() function to obtain from the user the name for an item, storing the information in the variable item_name.

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Exam Topics

Simple output: disp()

Tricky question: Use the disp() function to display the

value of π to four decimal places.

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Exam Topics

Input and Output

The fprintf() function

The format string

Placeholders

Format modifiers

left justification

width specifier

precision specifier

Escape sequences

Exam Topics

Formatted output: fprintf()

fprintf(‘%11s said he made $%-7.2f/year\n’, name, paycheck);

From the MATLAB command above, identify …

All placeholders

All format modifiers

All escape sequences

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Exam Topics

Using fprintf() and the provided variables for the red portions, provide the MATLAB statement that will display this sentence:

_ _ _ _John wants Jill_ _ _ to run up the hill 16 times

(where _ indicates a blank space)

A = ‘John’B = ‘Jill’C = ‘up’D = 4

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Exam Topics

Assuming the variables used are name, age, and income, provide an fprintf() statement that contains no spaces and will align the columns for any line in the table.

Fred Flintstone 47$100000.32

Barney "The Man" Rubble 148 $ 3.25

Exam Topics

Unary vs Binary operators&, &&, |, ||, +, -, *, /, ~, <, =, ==

From the set of operators above…

Which one(s) can be used as either unary or binary operators?

Which one(s) are only unary operators?24

Exam Topics

Numeric: Identify each of these operatorsMultiplication (scalar)Multiplication (matrix)Division (scalar)Division (matrix)Addition (scalar)Addition (matrix)Subtraction (scalar)Subtraction (matrix)Exponentiation (scalar)Exponentiation (matrix)Assignment

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Exam Topics

Name these operators:

Relational<, >, <=, >=, ==, ~=

Boolean&&, ||,

~

Know the true and false keywords26

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Exam Topics

Operators

Exam Topics

Functions

name = input(‘Enter a username:\n’, ‘s’);

In the MATLAB statement above, which symbol(s) indicate…

- the arguments

- collecting return values

- the function call

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Exam Topics

Modulus

How would you determine if a user-provided value (stored in the variable x) is divisible by 17?

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Exam Topics

Conditionals

The IF statement

What is the purpose of the IF statement?

When should we choose an IF over a SWITCH?

Do IF statements repeat?

What code can go in IF, ELSEIF, and ELSE clauses?

Exam Topics

IF / ELSEIF / ELSE:

Construct an IF statement that will print ‘Yes’ if the shuttle will launch; ‘No’ if the shuttle will not launch; ‘Maybe’ if it is unsure. Use a variable of your own choosing.

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Exam Topics

ConditionalsBoolean expressions

Using &&, ||, and ~

What is the output of this code?a = true;b = 1;c = -4;if a && ~(b>c)

disp('IF');else

disp('ELSE');end

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Exam Topics

Conditionals

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Exam Topics

ConditionalsBoolean expressions

Can we do this?if a == 1 || 2 || 3

disp('Yes');else

disp('No');end

How about:if 0 < a < b

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Exam Topics

Conditionals

The SWITCH statement

What is the purpose of the SWITCH statement?

When should we choose an SWITCH over an IF?

Do SWITCH statements repeat?

What goes after the word "switch"?

What code can go in the cases?

Exam Topics

SWITCH / CASE:

Provide a SWITCH-CASE statement that will process the menu below. Use a variable of your own choosing.

Press 1 to Jump

Press 2 to Duck

Press anything else to walk forward

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Exam Topics

Library Functions

What is a function?

Why use functions?

What are library functions?

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Exam Topics

Library Functions

What is a function call?

What is an argument?

What is a return value?

Can we have more than one?

What does it mean to "collect" the return value?

Must we provide arguments?

Must we collect the return value?

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Exam Topics

Library Functions

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Exam Topics

Nesting

What does this mean?

What can we nest?

What syntax issue should we watch?

Review for Exam 1

End of Presentation