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CP104 - Reminders

CP104 - Reminders. *** Labs start this week! *** Challenge for credit for students with strong previous computer programming background Friday Sept 12, 2:30-4:30 location TBA by Wednesday 4pm, email me if interested, tell me what language you want to write in

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CP104 - Reminders

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  1. CP104 - Reminders • *** Labs start this week! • *** Challenge for credit • for students with strong previous computer programming background • Friday Sept 12, 2:30-4:30 • location TBA • by Wednesday 4pm, email me if interested, tell me what language you want to write in • if writing through accessible learning, you must let them know so arrangements can be made

  2. Computers are everywhere! • 5% are “traditional” • 95% are “embedded”

  3. Hardware vs Software • physical devices composed of: • input units • output units • secondary storage-> stores programs and data (device off) • main memory-> stores program and data (while running) • central processing unit-> runs the program • program required to run the device • set of instructions that the processor follows to perform a task • types • operating system • utility programs • software development tools • application programs

  4. Programming Languages Operating System (Operating System Calls) Application Language Layer High Level Language Assembly Language(Low Level Language) Machine Language Hardware

  5. To run a program … program and data are written in high level language (a) compile program HLL -> LLL -> machine code(b) interpret program HLL -> LLL -> machine code

  6. Programs • Programming Languages • grammar varies by language and is rigid • static • 1,500 [99 Bottles of Beer] • paradigms: procedural, object-oriented, functional, logical • typing: static, dynamic • Natural Languages • grammar varies by language • dynamic • 7,000 • modalities: spoken, signed, written • pitch: intonation, tone The TIOBE Programming Community index is an indicator of the popularity of top 100 programming languages. The World Atlas of Language Structures is a large database of structural properties of languages.

  7. Procedural languages • procedural programs specify a series of computational steps to be carried out • in real life, comparable to writing • recipes, • instructions to build a model airplane, • instructions to construct a bookshelf from a wood working magazine, • instructions to put together “assembly required” furniture

  8. Mac and Cheese • analyze the provided recipe • Consider “Heat the milk in a medium saucepan over medium-high heat until it just comes to a simmer, then turn off the heat and set aside.”

  9. Sample Python program """ ------------------------------------------------------- greetings.py Prompt for name and greet ------------------------------------------------------- Author: Nora Znotinas ID: Email: nznotinas@wlu.ca Version: 2014-09-03 ------------------------------------------------------- """ name = input ( "Please enter your name: " ) print ( "Pleased to meet you " ) print ( name )

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