ERRE

ERRE was born as a university project (Politecnico di Milano - Italy) in the 80's on a C-64 computer. The language was ported to IBM PC and revised various times.

The actual versions are:

• '''V 2.6''' on PC IBM and compatibles (from MS-DOS 5.0 to Win XP)

• '''V 3.2''' on C-64

There also a reduced version for VIC-20 ('''V 1.3''') and a more recent version for PC ('''V 3.0''') with limited OOP support.

ERRE is a imperative programming language: it's compiled in R-Code and then executed with an interpreter.

Web site: '''ERRE PROJECT'''''http://www.claudiolarini.altervista.org/erre.htm''

Web site: '''ERRE TUTORIAL'''''http://www.claudiolarini.altervista.org/erre_tutor.htm''

Tasks

• 100 doors
• 24 game/Solve
• A+B
• ABC Problem
• Accumulator factory
• Ackermann function
• Address of a variable
• Almost prime
• Amb
• Amicable pairs
• Animate a pendulum
• Apply a callback to an array
• Arithmetic evaluation
• Arithmetic-geometric mean
• Arithmetic/Complex
• Arithmetic/Integer
• Arithmetic/Rational
• Array concatenation
• Arrays
• Averages/Median
• Averages/Mode
• Averages/Pythagorean means
• Averages/Root mean square
• Bitmap/Flood fill
• Bitmap/Midpoint circle algorithm
• Bresenham's Line Algorithm
• Caesar cipher
• Catalan numbers
• Catalan numbers/Pascal's triangle
• Circles of given radius through two points
• Classes
• Combinations
• Comments
• Create a file
• Create a two-dimensional array at runtime
• Day of the week
• Detect division by zero
• Determine if a string is numeric
• Dinesman's multiple-dwelling problem
• Dragon curve
• Draw a sphere
• Empty program
• Equilibrium index
• Ethiopian multiplication
• Euler's sum of powers conjecture
• Evaluate binomial coefficients
• Even or odd
• Execute a system command
• Exponentiation operator
• Factorial
• Factors of an integer
• Fast Fourier transform
• Fibonacci n-step number sequences
• Fibonacci sequence
• Find the missing permutation
• Five weekends
• FizzBuzz
• Floyd's triangle
• Formatted numeric output
• Function definition
• Greatest common divisor
• Greatest element of a list
• Greatest subsequential sum
• Guess the number
• Hamming numbers
• Haversine formula
• Hello world!
• Hello world/Line printer
• Hello world/Newline omission
• Hello world/Text
• Heronian triangles
• Higher-order functions
• Hofstadter Q sequence
• Horizontal sundial calculations
• Horner's rule for polynomial evaluation
• Identity matrix
• Increment a numerical string
• Infinity
• Input loop
• Integer sequence
• Interactive programming
• Iterated digits squaring
• Josephus problem
• Jump anywhere
• Keyboard input/Flush the keyboard buffer
• Keyboard input/Keypress check
• Keyboard input/Obtain a Y or N response
• Knight's tour
• Knuth shuffle
• Leap year
• Least common multiple
• Letter frequency
• Levenshtein distance
• Linear congruential generator
• Literals/Integer
• Look-and-say sequence
• Loops/Break
• Loops/Continue
• Loops/Do-while
• Loops/Downward for
• Loops/For
• Loops/For with a specified step
• Loops/Foreach
• Loops/Infinite
• Loops/N plus one half
• Loops/Nested
• Loops/While
• Lucas-Lehmer test
• Magic squares of odd order
• Make directory path
• Mandelbrot set
• Map range
• Matrix multiplication
• Matrix-exponentiation operator
• Maximum triangle path sum
• Menu
• Middle three digits
• Modular inverse
• Monte Carlo methods
• Multifactorial
• Multiple regression
• N'th
• N-queens problem
• Narcissistic decimal number
• One of n lines in a file
• One-dimensional cellular automata
• Pascal's triangle
• Perfect numbers
• Primality by trial division
• Prime decomposition
• Probabilistic choice
• Pythagorean triples
• Quaternion type
• Queue/Definition
• Quine
• Random numbers
• Rate counter
• Read a file line by line
• Real constants and functions
• Rename a file
• Repeat a string
• Resistor mesh
• Return multiple values
• Reverse a string
• Roman numerals/Decode
• Roman numerals/Encode
• Roots of a function
• Roots of a quadratic function
• Roots of unity
• Rot-13
• Runge-Kutta method
• Semiprime
• Sequence of primes by trial division
• Sierpinski carpet
• Sierpinski triangle/Graphical
• Sieve of Eratosthenes
• Sleep
• Sort disjoint sublist
• Sorting algorithms/Bubble sort
• Sorting algorithms/Insertion sort
• Sorting algorithms/Merge sort
• Sorting algorithms/Quicksort
• String concatenation
• String prepend
• Sudoku
• Tic-tac-toe
• Trabb Pardo–Knuth algorithm
• Twelve statements
• Ulam spiral (for primes)
• Unbias a random generator
• Undefined values
• Van der Corput sequence
• Variable size/Set
• Vector products
• Video display modes
• Zebra puzzle
• Zero to the zero power
• Zig-zag matrix