CSC 142/Chapter 3 - Revision history

Admin: /* Puzzle 3 */

2016-10-03T05:23:40Z

Puzzle 3

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	===Puzzle 3===		===Puzzle 3===

	Caesar cipher cryptograms with no spaces (frequency or brute force)		[[Puzzles/Fall 2016/Puzzle 3]]: Et three, brute? (Caesar cipher cryptograms with no spaces (frequency or brute force)

	~~[[Puzzles/Crypto Level 1/Puzzle 3]]~~

	===Profiles===		===Profiles===

2016-10-03T04:43:35Z

Profiles

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	* Utilizing this turned a sum problem into a multiplication problem		* Utilizing this turned a sum problem into a multiplication problem
	* Lesson: by changing your pattern of thinking/problem solving, can open up new, better, faster approaches		* Lesson: by changing your pattern of thinking/problem solving, can open up new, better, faster approaches

			Julius Caesar
			* History lesson: why important
			* Sometimes, connecting seemingly unconnected topics can lead to sudden insights
			* Need for security, military applications of cryptography
			* Back to the definition of programming: "turning a task that requires repeated computation into something that a machine can execute"
			* Computation is as old as civilization itself

	=Flags=		=Flags=

	{{CSC142Flag}}		{{CSC142Flag}}

2016-09-27T04:16:31Z

Lecture Code

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	* no limit to the kinds of mathematics we can implement		* no limit to the kinds of mathematics we can implement
	* very deep and profound connection between programming and mathematics		* very deep and profound connection between programming and mathematics

			Scope
			* Illustrate a few simple scope examples

	===Worksheet Code===		===Worksheet Code===

2016-09-27T04:11:00Z

Profiles

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	Carl Freidrich Gauss		Carl Freidrich Gauss
	* Adding up the sum of all integers from 1-100		* Adding up the sum of all integers from 1-100
			* Add up 100 numbers: pair off, and get 101 each time. 100 and 1, 99 and 2, etc. Then 100*101/2 = 10100/2 = 5050
	* First approach: don't manage the complexity, just dive in and have at it		* First approach: don't manage the complexity, just dive in and have at it
	* Gauss: found an alternative pattern		* Gauss: found an alternative pattern

2016-09-15T19:20:43Z

Puzzle 3

← Older revision		Revision as of 19:20, 15 September 2016
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	===Puzzle 3===		===Puzzle 3===

	~~Crypto resources: http://www.math.brown.edu/%7Ejhs/MathCrypto/MCOnlineExercises.html~~		Caesar cipher cryptograms with no spaces (frequency or brute force)

	~~Block Caesar cipher puzzles~~		[[Puzzles/Crypto Level 1/Puzzle 3]]
	* Now you know what type of puzzle they are
	* Now you can brute-force them (by hand)
	* Think about how to do this programmatically

	~~For now, still focusing on cracking cryptograms, finding pattern.~~

	~~Cryptograms with original spacing~~

	===Profiles===		===Profiles===

2016-09-14T19:20:49Z

Homework Code

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	* Get them to link chars with integers		* Get them to link chars with integers
	* Hint: try executing this Java code: "'a' + 5"		* Hint: try executing this Java code: "'a' + 5"

	~~===Homework Code===~~

	~~(homework problems?)~~

	==Chapter 3 Homework==		==Chapter 3 Homework==

2016-09-13T20:52:20Z

HW Details

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	* 6 - function find larger of abs of 2 numbers		* 6 - function find larger of abs of 2 numbers
	* 16 - triangle area using Heron's formula		* 16 - triangle area using Heron's formula
			* 19 - reverse string

	==Chapter 3 Goodies==		==Chapter 3 Goodies==

2016-09-13T20:52:01Z

HW Summary

← Older revision		Revision as of 20:52, 13 September 2016
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	(Recommended) Self-check problems: #3, #7, #9, #13, #14, #20, #26		(Recommended) Self-check problems: #3, #7, #9, #13, #14, #20, #26

	(Required) Exercises: #1, #6, #16,		(Required) Exercises: #1, #6, #16, #19

	(Required) Projects: (none)		(Required) Projects: (none)

2016-09-13T20:51:49Z

Chapter 3 Homework

← Older revision		Revision as of 20:51, 13 September 2016
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	(Required) Exercises: #1, #6, #16,		(Required) Exercises: #1, #6, #16,

	(Required) Projects: #2		(Required) Projects: (none)

	===HW Details===		===HW Details===

			Self-check:
			* 3 - spotting mistakes
			* 7, 9 - mystery program
			* 13 - math operations
			* 14 - mystery return
			* 20 - string method calls
			* 26 - get a phrase from user and repeat phrase

			Exercises:
			* 1 - print formatting digits
			* 6 - function find larger of abs of 2 numbers
			* 16 - triangle area using Heron's formula

	==Chapter 3 Goodies==		==Chapter 3 Goodies==

2016-09-13T20:47:10Z

HW Summary