hello-world

Simple “hello world”-style template programs. These will get you started writing programs in various languages.

Inspired by Rosetta Code

See also Rosetta Code for hello world web server

A Partial List of Interesting Languages

A List of Languages:

• c
• c++
• c++ with boost (?)
• java
• octave
• python
• awk
• bash
• fortran
• go
• haskell
• lisp
• perl
• php
• ruby

List of Programs

List of Programs Implemented for All Languages

Hello World:

• Your basic hello world program, prints something and exits.

What time is it:

• Prints the date as YYYY-MM-DD
• Prints the time as HH:MM:SS
• Shows how to get dates and times in the language, and format them for a standard output.

99 Bottles:

• Prints the lyrics to “99 Bottles of Beer on the Wall”
• Shows looping in the language.

Factorial:

• Implements the factorial function: 4! = 4*3*2*1
• Uses iterative and recursive versions

HTTP Get:

• Implements accessing an HTTP resource using get
• Link

HTTP Server:

• Implements running an http server
• Link

Calculus: Simpson’s Rule for Integration

• Implements composite Simpson’s Rule to integrate a function over an interval [a,b] using n approximating points

N Queens:

• Solve the N queens problem using integer arrays, with minimal object-oriented fluff.

Programs In Progress

HTTP Post:

• Access an API using POST request

Algebra: Log and Trig Tables

• Print out logarithm and trigonometric tables
• Exercises trigonometric functions, formatted print functionality, loops

Calculus: Taylor Series Approximation of Sine Function

• Implements a Taylor Series to approximate a sine function

Calculus: Newton’s Method

• Implements Newton’s Method to compute the roots of an arbitrary function f(x)

Programs To Implement

Arrays:

• Use a native built-in data type to store a 1D array of data

Matrix inversion:

• Gauss-Jordan elimination or back-substitution algorithm

Vector products:

• Given three three-dimensional vectors, compute dot/cross product, scalar/vector triple products
• http://rosettacode.org/wiki/Vector_products

Time a function:

• Time a function.
• http://rosettacode.org/wiki/Time_a_function

Calculus:

• Compute the numerical derivative of a function
• Compute the numerical integral of a function
• Integrate a differential equation