Package edu.princeton.cs.introcs

Class Summary

Class	Description
AlbersSquares
ArrayStackOfStrings
Average	Compilation: javac Average.java Execution: java Average < data.txt Dependencies: StdIn.java StdOut.java Reads in a sequence of real numbers, and computes their average.
Beckett	Compilation: javac Beckett.java Execution: java Beckett N Prints instructions for a Beckett play with N actors.
Bernoulli	Compilation: javac Bernoulli.java Execution: java Bernoulli N T Dependencies: StdDraw.java Each experiment consists of flipping N fair coins T times.
Binary	Compilation: javac Binary.java Execution: java Binary n Prints out n in binary.
BinarySearch
Body	Compilation: javac Body.java Execution: java Body Dependencies: Vector.java StdDraw.java Implementation of a 2D Body with a position, velocity and mass.
BouncingBall	Compilation: javac BouncingBall.java Execution: java BouncingBall Dependencies: StdDraw.java Implementation of a 2-d bouncing ball in the box from (-1, -1) to (1, 1).
Brownian	Compilation: javac Brownian.java Execution: java Brownian var Dependencies: StdDraw.java Plots Brownian motion trajectory using the midpoint displacement method.
BST<Key extends Comparable<Key>,Val>
Cat	Compilation: javac Cat.java Execution: java Cat file1.txt file2.txt file3.txt output.txt Dependencies: In.java Reads in text files specified as the first command-line parameters, concatenates them, and writes the result to filename specified as the last command line parameter.
Charge	Compilation: javac Charge.java Execution: java Charge x y
ChargeClient	Compilation: javac ChargeClient.java Execution: java ChargeClient x y
CompareAll	Compilation: javac CompareAll.java Execution: java CompareAll 5 10000 < docs.txt
Complex	Compilation: javac Complex.java Execution: java Complex ADT for complex numbers using polar representation.
Counter	Compilation: javac Counter.java Execution: java Counter Dependencies: StdRandom.java StdOut.java % java Counter 6 600000 0: 99870 1: 99948 2: 99738 3: 100283 4: 100185 5: 99976
Coupon	Compilation: javac Coupon.java Execution: java Coupon N % java Coupon 1000 6522 % java Coupon 1000 6481 % java Coupon 1000000 12783771
CouponCollector	Compilation: javac CouponCollector.java Execution: java CouponCollector N Given N distinct card types, how many random cards do you need do collect before you have (at least) one of each type? This program simulates this random process.
DeDup	Compilation: javac DeDup.java Execution: java DeDup < words.txt Dependencies: SET.java StdIn.java Read in a list of words from standard input and print out each word, removing any duplicates.
DivisorPattern	Compilation: javac DivisorPattern.java Execution: java DivisorPattern N Prints a table where entry (i, j) is a '* ' if i divides j or j divides i and '.
Document	Compilation: javac Document.java Execution: java Document < docs.txt % java Document genomeA.txt 2 16
DoublingStackOfStrings
DoublingTest	Compilation: javac DoublingTest.java Execution: java DoublingTest % java DoublingTest 512 6.48 1024 8.30 2048 7.75 4096 8.00 8192 8.05 ...
Estimate	Compilation: javac Estimate.java Execution: java Estiamte N p trials Dependencies: Percolation.java StdOut.java Repeatedly generated N-by-N boolean matrices, where each site is true with probability p, and compute the probability that the system percolates.
Euclid	Compilation: javac Euclid.java Execution: java Euclid p q Reads two command-line arguments p and q and computes the greatest common divisor of p and q using Euclid's algorithm.
Evaluate	Compilation: javac Evaluate.java Execution: java Evaluate Dependencies: Stack.java Evaluates (fully parenthesized) arithmetic expressions using Dijkstra's two-stack algorithm.
Factors	Compilation: javac Factors.java Execution: java Factors N Computes the prime factorization of N using brute force.
Fade
Flip	Compilation: javac Flip.java Execution: java Flip Simulate a fair coin flip and print out "Heads" or "Tails" accordingly.
FrequencyCount	Compilation: javac FrequencyCount.java Execution: java FrequencyCount < file.txt Dependencies: StdIn.java Counter.java Read in a sequence of words, separated by whitespace.
Gambler	Compilation: javac Gambler.java Execution: java Gambler stake goal N Simulates a gambler who start with $stake and place fair $1 bets until she goes broke or reach $goal.
Gaussian	Compilation: javac Gaussian.java Execution: java Gaussian x mu sigma Function to compute the Gaussian pdf (probability density function) and the Gaussian cdf (cumulative density function) % java Gaussian 820 1019 209 0.17050966869132111 % java Gaussian 1500 1019 209 0.9893164837383883 % java Gaussian 1500 1025 231 0.9801220907365489 The approximation is accurate to absolute error less than 8 * 10^(-16).
GeneFind	Compilation: javac GeneFind.java Execution: java GeneFind start stop < input.txt To find a gene in a genome, we scan for the start codon, remember its index, then scan from the next stop codon.
Graph	The Graph class represents an undirected graph of vertices with string names.
GraphGenerator	Compilation: javac GraphGenerator.java Dependencies: Graph.java
Grayscale
Harmonic	Compilation: javac Harmonic.java Execution: java Harmonic N Prints the Nth harmonic number: 1/1 + 1/2 + ...
HelloWorld	Compilation: javac HelloWorld.java Execution: java HelloWorld Prints "Hello, World".
Histogram	Compilation: javac Histogram.java This data type supports simple client code to create dynamic histograms of the frequency of occurrence of values in [0, N).
Htree	Compilation: javac Htree.java Execution: java Htree N Dependencies: StdDraw.java Plot an order N Htree.
IFS	Compilation: javac IFS.java Execution: java IFS N < input.txt Dependencies: StdDraw.java Here are some sample data files: http://www.cs.princeton.edu/introcs/22library/barnsley.txt http://www.cs.princeton.edu/introcs/22library/binary.txt http://www.cs.princeton.edu/introcs/22library/culcita.txt http://www.cs.princeton.edu/introcs/22library/cyclosorus.txt http://www.cs.princeton.edu/introcs/22library/dragon.txt http://www.cs.princeton.edu/introcs/22library/fern-sedgewick.txt http://www.cs.princeton.edu/introcs/22library/fishbone.txt http://www.cs.princeton.edu/introcs/22library/floor.txt http://www.cs.princeton.edu/introcs/22library/koch.txt http://www.cs.princeton.edu/introcs/22library/sierpinski.txt http://www.cs.princeton.edu/introcs/22library/spiral.txt http://www.cs.princeton.edu/introcs/22library/swirl.txt http://www.cs.princeton.edu/introcs/22library/tree.txt http://www.cs.princeton.edu/introcs/22library/zigzag.txt
Index	Compilation: javac Index.java Execution: java Index i j < input.txt Dependencies: BST.java Queue.java StdIn.java StdOut.java Data files: http://www.cs.princeton.edu/introcs/44st/TaleOfTwoCities.java Create an index of all words in the given input file such that the word has length >= i and occurs >= j times.
IndexGraph	Compilation: javac IndexGraph.java Dependencies: Graph.java In.java Execution: java IndexGraph movies.txt "/" Builds a graph, then accepts vertex names from standard input and prints its neighbors.
Insertion	Compilation: javac Insertion.java Execution: java Insertion < input.txt Reads in strings from standard input and prints them in sorted order.
InsertionTest	Compilation: javac InsertionTest.java Execution: java InsertionTest 10 The method timeTrials() runs InsertionSort.sort() for arrays of random double values.
IntOps	Compilation: javac IntOps.java Execution: java IntOps a b Illustrates the integer operations a * b, a / b, and a % b.
LeapYear	Compilation: javac LeapYear.java Execution: java LeapYear N Prints true if N corresponds to a leap year, and false otherwise.
LinkedStackOfStrings	Compilation: javac LinkedStackOfStrings.java Execution: java LinkedStackOfStrings A stack of strings, implemented using a linked list.
Lookup	Compilation: javac Lookup.java Execution: java Lookup file.csv keyField valField Dependencies: BST.java In.java StdIn.java Data files: http://www.cs.princeton.edu/introcs/44st/amino.csv http://www.cs.princeton.edu/introcs/44st/ip.csv http://www.cs.princeton.edu/introcs/44st/DJIA.csv Reads in a set of key-value pairs from a two-column CSV file specified on the command line; then, reads in keys from standard input and prints out corresponding values.
LRS
Luminance
Mandelbrot
Markov	Compilation: javac Markov.java Execution: java Markov T Data files: http://introcs.cs.princeton.edu/16pagerank/tiny.txt http://introcs.cs.princeton.edu/16pagerank/medium.txt This program reads a transition matrix from standard input and computes the probabilities that a random surfer lands on each page (page ranks) after T matrix-vector multiplies.
MD1Queue	Compilation: javac MD1Queue.java Execution: java MD1Queue lambda mu Dependencies: Queue.java Simulate an M/D/1 queue where arrivals obey a Poisson process with arrival rate lambda, and service times are deterministic with rate mu.
Merge	Compilation: javac Merge.java Execution: java Merge N A bare-bones N log N implementation of mergesort.
Newton	Compilation: javac Newton.java Execution: java Newton x0 x1 x2 x3 Compute the square root using Newton's method.
PathFinder	Compilation: javac PathFinder.java Execution: java Pathfinder input.txt delimiter source Dependencies: Queue.java Stack.java Graph.java Runs breadth first search algorithm from source s on a graph G.
Percolation	Compilation: javac Percolation.java Execution: java Percolation < input.txt Dependencies: StdArrayIO.java StdDraw.java StdOut.java Data files: http://www.cs.princeton.edu/introcs/24percolation/testEZ.txt http://www.cs.princeton.edu/introcs/24percolation/testD.txt % more testD.txt 8 8 0 0 0 1 1 1 0 1 1 1 1 0 0 1 1 1 1 0 1 0 0 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 0 1 0 0 1 1 0 1 0 0 1 0 0 1 1 0 0 1 1 1 0 0 1 0 0 0 0 0 % java Percolation < testD.txt 8 8 0 0 0 1 1 1 0 1 1 1 1 0 0 1 1 1 1 0 1 0 0 1 0 0 1 0 1 1 1 1 0 0 1 0 0 1 0 1 0 0 1 1 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 true
PercPlot	Compilation: javac PercPlot.java Execution: java PercPlot N This recursive program draws a plot of the percolation probability (experimental observation) against the site vacancy probability (control variable).
PlayThatTune	Compilation: javac PlayThatTune.java Execution: java PlayThatTune < input.txt Dependencies: StdAudio.java StdAudio.java This is a data-driven program that plays pure tones from the notes on the chromatic scale, specified on standard input by their distance from concert A.
PlayThatTuneDeluxe	Compilation: javac PlayThatTuneDeluxe.java Execution: java PlayThatTuneDeluxe < data.txt % java PlayThatTuneDeluxe 0.5 < elise.txt Data files ---------- http://www.cs.princeton.edu/introcs/21function/elise.txt http://www.cs.princeton.edu/introcs/21function/99luftballons.txt http://www.cs.princeton.edu/introcs/21function/freebird.txt http://www.cs.princeton.edu/introcs/21function/Ascale.txt http://www.cs.princeton.edu/introcs/21function/National_Anthem.txt http://www.cs.princeton.edu/introcs/21function/looney.txt http://www.cs.princeton.edu/introcs/21function/StairwayToHeaven.txt http://www.cs.princeton.edu/introcs/21function/entertainer.txt http://www.cs.princeton.edu/introcs/21function/old-nassau.txt http://www.cs.princeton.edu/introcs/21function/arabesque.txt http://www.cs.princeton.edu/introcs/21function/firstcut.txt http://www.cs.princeton.edu/introcs/21function/tomsdiner.txt http://www.cs.princeton.edu/introcs/21function/portal.txt
PlotFilter	Compilation: javac PlotFilter.java Execution: java PlotFilter < input.txt Dependencies: StdDraw.java StdIn.java % java PlotFilter < USA.txt Datafiles: http://www.cs.princeton.edu/IntroProgramming/15inout/USA.txt
Potential
PowersOfTwo	Compilation: javac PowersOfTwo.java Execution: java PowersOfTwo N This program takes a command-line argument N and prnts a table of the powers of 2 that are less than or equal to 2^N.
PrimeSieve	Compilation: javac PrimeSieve.java Execution: java -Xmx1100m PrimeSieve N Computes the number of primes less than or equal to N using the Sieve of Eratosthenes.
Quadratic	Compilation: javac Quadratic.java Execution: java Quadatic b c Given b and c, solves for the roots of x*x + b*x + c.
Queue<Item>	The Queue class represents a first-in-first-out (FIFO) queue of generic items.
RandomInt	Compilation: javac RandomInt.java Execution: java RandomInt N Prints a pseudo-random integer between 0 and N-1.
RandomSeq	Compilation: javac RandomSeq.java Execution: java RandomSeq N Prints N numbers between 0 and 1.
RandomSurfer	Compilation: javac RandomSurfer.java Execution: java RandomSurfer T Data files: http://introcs.cs.princeton.edu/16pagerank/tiny.txt http://introcs.cs.princeton.edu/16pagerank/medium.txt % java Transition < tiny.txt | java RandomSurfer 1000000 0.27297 0.26583 0.14598 0.24729 0.06793
RangeFilter	Compilation: javac RangeFilter.java Execution: java RangeFilter lo hi < input.txt Dependencies: StdIn.java Read in a sequence of integers from standard input and print out those values between lo and hi.
Ruler	Compilation: javac Ruler.java Execution: java Ruler Prints the relative lengths of the subdivisions on a ruler.
Sample	Compilation: javac Sample.java Execution: java Sample M N This program takes two command-line arguments M and N and produces a random sample of M of the integers from 0 to N-1.
Scale
SelfAvoidingWalk	Compilation: javac SelfAvoidingWalk.java Execution: java SelfAvoidingWalk N T Generate T self-avoiding walks of length N.
SET<Key extends Comparable<Key>>	The SET class represents an ordered set of comparable keys.
SmallWorld	Compilation: javac SmallWorld.java Dependencies: Graph.java PathFinder.java
Spiral	Compilation: javac LogSpiral.java Execution: java LogSpiral Dependencies: Turtle.java Plots a log-spiral.
Split	Compilation: javac Cat.java Execution: java Split DJIA N delimiter Dependencies: In.java Out.java This program uses multiple output streams to split a CSV file into separate files, one for each comma-delimited field.
Sqrt	Compilation: javac Sqrt.java Execution: java Sqrt c Computes the square root of a nonnegative number c using Newton's method: - initialize t = c - replace t with the average of c/t and t - repeat until desired accuracy reached % java Sqrt 2 1.414213562373095 % java Sqrt 1000000 1000.0 % java Sqrt 0.4 0.6324555320336759 % java Sqrt 1048575 1023.9995117186336 % java Sqrt 16664444 4082.2106756021303 % java Sqrt 0 0.0 % java Sqrt 1e-50 9.999999999999999E-26 Remarks ---------- - using Math.abs() is required if c < 1 Known bugs ---------- - goes into an infinite loop if the input is negative
ST<Key extends Comparable<Key>,Value>	The ST class represents an ordered symbol table of generic key-value pairs.
Stack<Item>	The Stack class represents a last-in-first-out (LIFO) stack of generic items.
StdArrayIO	Standard array IO.
StdRandom	Standard random.
StdStats	Standard statistics.
StockAccount	Compilation: javac StockAccount.java Execution: java StockAccount < input.txt Dependencies: In.java StdOut.java StockQuote.java % more Turing.txt Turing, Alan 10.24 5 100 ADBE 25 GOOG 97 IBM 250 MSFT 200 YHOO % java StockAccount Turing.txt Turing, Alan Cash: $ 10.24 100 ADBE $ 40.62 $ 4062.00 25 GOOG $500.03 $ 12500.75 97 IBM $117.35 $ 11382.95 250 MSFT $ 29.71 $ 7427.50 200 YHOO $ 23.80 $ 4760.00 Total: $ 40143.44
StockQuote	Compilation: javac StockQuote.java Execution: java StockQuote symbol Dependencies: In.java, StdOut.java Print the stock price of the stock with the given symbol.
Stopwatch	Compilation: javac Stopwatch.java
TenHellos	Compilation: javac TenHellos.java Execution: java TenHellos Prints ith Hello for i = 1 to 10.
ThreeSum	Compilation: javac ThreeSum.java Execution: java ThreeSum < input.txt java N Generator | java ThreeSum A program with cubic running time.
TowersOfHanoi	Compilation: javac TowersOfHanoi.java Execution: java TowersOfHanoi N Solves the Towers of Hanoi problem on N discs.
Transition	Compilation: javac Transition.java Execution: java Transition < input.txt Data files: http://introcs.cs.princeton.edu/16pagerank/tiny.txt http://introcs.cs.princeton.edu/16pagerank/medium.txt This program is a filter that reads links from standard input and produces the corresponding transition matrix on standard output.
Turtle
TwentyQuestions	Compilation: javac TwentyQuestions.java Execution: java TwentyQuestions n Dependencies StdIn.java This code uses binary search to play the game of twenty questions.
Universe	Compilation: javac Universe.java Execution: java Universe dt < input.txt Dependencies: Body.java Vector.java StdIn.java StdDraw.java Datafiles: http://www.cs.princeton.edu/introcs/34nbody/2body.txt http://www.cs.princeton.edu/introcs/34nbody/3body.txt http://www.cs.princeton.edu/introcs/34nbody/4body.txt http://www.cs.princeton.edu/introcs/34nbody/2bodyTiny.txt This data-driven program simulates motion in the universe defined by the standard input stream, increasing time at the rate on the command line.
UseArgument	Compilation: javac UseArgument.java Execution: java UseArgument yourname Prints "Hi, Bob.
Vector	Compilation: javac Vector.java Execution: java Vector Implementation of a vector of real numbers.
VerticalPercolation	Compilation: javac VerticalPercolation.java Execution: java VerticalPercolation < input.txt Dependencies: StdArrayIO.java StdOut.java % java VerticalPercolation < testD.txt 8 8 0 0 0 1 1 1 0 1 1 1 1 0 0 1 1 1 1 0 1 0 0 1 0 0 1 0 1 1 1 1 0 0 1 0 0 1 0 1 0 0 1 1 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 false % java VerticalPercolation < testV.txt 8 8 0 0 0 1 1 1 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 true
Visualize	Compilation: javac Visualize.java Execution: java Visualize N p trials Dependencies: Percolation.java StdDraw.java Repeatedly generated N-by-N boolean matrices, where each site is true with probability p.