StuDocu is not sponsored or endorsed by any college or universityCMSC131 - Lecture notes AllObject-Oriented Programming I (University of Maryland)StuDocu is not sponsored or endorsed by any college or universityCMSC131 - Lecture notes AllObject-Oriented Programming I (University of Maryland)Downloaded by William Rabalais ([email protected])lOMoARcPSD|14265820html-color-codes.info/colors-from-image/www.manning.com/books/generative-arthttp://codingbat.com/javaDefinitions:1. Algorithm is the idea expressed by a program and is a generalized idea of a program independent of language2. A program is a sequence of clear instructions in an artificial programming language3. Different Programming Languages:a. Artificial- designed for a purposeb. Evolving- changing over timec. Equivalent- all general purpose languages can perform the same computations4. Computing in Processa. Data types- how to write data valuesb. Variables- how to store/retrieve datac. Expressions- how to calculate5. A computer is a general purpose programmable machine that processes or manipulates data6. Integer Data Type: for integers7. Float Data Type: for floating point valuesa. Fixed - 12.34 10b. Scientific Notation - 10e12 -1.3e-4c. Explicitly Typed- 12.3f 10f8. Sequential Processing: processed one line at a time and processed in order first to last.9. Von Neumann Machinea. Four parts: Input to Processor to both Output and Memory. b. Four Concepts:Sequential processing, stored program, binary circuits, electrical power. c. Java/Processing Commands are all either:i. Input: Data from input to memoryii. Assignments: data from memory to memoryiii. Outputs: data from memory to output10. Variable: we can declare a variable by first putting its type, then name, separated by a space, and ending with a semicolon11. What makes a good program?a. Good comments, Efficient, Organized, Easy to use, Functionality b. A program is correct if it matches the specifications. It is readable if it communicates well to a reader and efficient if it is shorter, faster. 12. What’s a <boolean expression>a. Values: True or Falseb. Operators: or II , and && , not !c. Variables: boolean isHappy=True13. Case Analysis: table of cases and actions. Cases do not overlap, mutually exclusive. 14. CPU: central processing unit, brains of the computerDownloaded by William Rabalais ([email protected])lOMoARcPSD|1426582015. ROM: read only memory, hold bootstrapping code in a form of firmware16. Hard Disk: example is hard drive, files are all stored here17. RAM: random access memory, way fast than disk, variables are stored here18. Cache: there are little levels. a. L1 is the fastest and smallestb. L2 slower than 1 but faster than 3c. L3 largest and slowest19. Operating System: system software that makes computer do work. Interface between programs and hardware20. Applications: software you install in your operating system21. Gregory’s Series 22. Iteration: mechanism of repetition 23. Conditional Processing : while there’s more data, get some, if it meets a condition, process it24. Integer Division:a. a / b is 3 (when a = 10 and b = 3)b. a % b is 1i. % is mod function (remainder)25. Methods vs Call a. Call needs a header, tells you what goes in and what goes outb. Method e.x println(sqr(4));i. Writing own Method:1. header { Examples: cube(x) x^3 2. body sigmoid(x) = 1/(1+e^x)3. } ii. Writing own method: float cube ( float x ) { return x * x * x }OR float abs ( float x ) {if (x < 0) return - x;else return x; }OR float max2( float x, float y) {if ( x > y) return x;else return y; }c. Call e.x println(2*sqr(2018);d. float y = sqr(PI)+4;e. Variable/Parameter can be constant26. Whats void? Means no return statement - method prints, drawsDownloaded by William Rabalais ([email protected])lOMoARcPSD|1426582027. Static and Dynamic Modea. Static: no definitions (e.x what goes into void setup();)b. Dynamic: method definitions (e.x is void)28. A local variable is valid only in the block which it is declared29. Series is a continuing sum of sequence of terms. 30. General Structure for Method: <type> <method name> (<parameters>) {a. <statements)b. <return>31. Arrays: instead of one variable and one value, one variable and multiple locations a. <type> [ ] <name> = new <type> [memory]b. Array Operations: does A equal B, copy A and B, sum product32. Naming Conventionsa. i, j, k used as indicesb. n, m used as length33. Geometric mean is to average as factorial is to sum34. Search: how to find an array if it contains a known key35.Documenting Your Code:1. //Lab # (NAME OF LAB)2. //S. Gessner, Month/Day/YearCommands:1. point(x,y);2. line(x,y,x2,y2);3. rect(x,y,w,h);4. triangle(x,y,x2,y2,x3,y3);5. quad(x,y,x2,y2,x3,y3,x4,y4);6. ellipse(x,y,w,h);7. arc(x,y,w,h,start,stop);8. fill(c); // set fill color (R,G,B,transparency”) 9. noFill();// set transparent fill10. stroke(c);// set stroke color11. noStroke(); //set transparent stroke12. keyPressed()13. void draw() {}14. void setup() {}15. float x = random16. float y = random17. strokeWeight()18. frameRate() // slows down or speeds up. The bigger # the faster19. To create a variable:a. Int x = 0 // the width begins at 0Downloaded by William Rabalais ([email protected])lOMoARcPSD|14265820b. Or to increase by 20…. X = x + 2020. void keyPressed(); //Is an event, happens when key is presseda. If (key == ‘s’)i. saveFrame(“pic###.jpg”)b. println(key)21. “Pic.jpg” //double quotes, multiple symbols22. println((int)key); //a cast converts types23. if (key == ‘’) // Use if to turn off stroke, change fill color, change stroke color… etc. a. Or if (<boolean_expression>)i. <statement>b. if (x> width) {c. Or if (<boolean_expression>)i. <statement1>ii. Elseiii. <statement2>d.24. void mouseDragged() { //happens when mouse is moved and dragged25. Equal is == , not equal is != , less than/equal is <= , greater than/equal >=26. abs(x) //absolute value27.Practice:1. Writing if Statements1. y = I x I a. if (x>=0) if (x<0)b. y = x y = -xc. if (x<0) elsed. y = -x; y = x;2. z= max(x,y) a. if (x>y) b. z = x; c. else d. z = y1. r= -b+-sqroot b^2-4ac all of 2a2. d = sqroot b^2-4aca. D = sqrt(b*b-4*a*c);b. if (d==0)c. r1 = -b1. Give grades. A >90 B>80 C elsea. if (score>90)b. grade = ‘A’;c. else if (score>80)d. grade = ‘B’;e. else Downloaded by William Rabalais ([email protected])lOMoARcPSD|14265820f. grade = ‘C’;2. For loopa. For (<init> ; <test> ;
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