Edit Please don't do this! You will find that MATLAB arrays either numeric or cell will let you do the same thing in a much faster, much more readable way. For example, if A1 through A10 contain scalars, use:
An assert macro with informative failure reports, as a syntax-rule or a defmacro.
A concise definition form with optional arguments and default values MetaScheme, or untyped MetaOCaml and the underlying alpha-conversion macro Applicative syntax-rules: It is very difficult to write macros that compose, to assemble complex macros from already written and tested components.
The previous approaches to composable syntax-rules are heavy, notationally and computationally. This article presents an alternative, lightweight style of writing composable syntax-rules, based on the CK abstract machine. We demonstrate recursive, higher-order applicative macros defined in the style that looks like that of ML or strict Haskell.
We write composable, call-by-value--like macros without resorting to the continuation-passing-style and thus requiring no macro-level lambda. The syntax remains direct-style, with nested applications. Syntax-rules are difficult to compose because of their evaluation order: That per se does not preclude functional composition since the normal-order lambda-calculus or non-strict languages like Haskell do not evaluate arguments of a function application either.
However, lambda-calculus has first-class anonymous abstractions; Haskell also has the case form that forces evaluation of an expression, to the extent needed to choose among the pattern-match clauses. Syntax-rules have none of these compensating features.
Generally, a syntax-rule cannot obtain the result of the expansion of its argument expression. The article on Systematic Macro Programming on this page explains the composability problem in detail. So far, the only way out has been to effectively change the evaluation order by writing macros in the continuation-passing style CPS.
However, CPS code is hard to read.
Furthermore, building continuations requires the notation for first-class, preferably anonymous syntax-rule abstractions. Although the latter are possible to emulate, the result is stylistically ugly and computationally expensive.
Some macro expanders take the shocking amount of time and memory to expand CPS macros with anonymous abstractions. This project was inspired by the question posed by Dan Friedman in March Write the macro permute that takes any number of arguments and returns the list of their permutations: One should write permute without resorting to CPS.
Our answer is the transliteration of the standard Haskell code implementing the straightforward algorithm for all permutations: Our macros are written in a CK style.
Values are regarded as results of the CK evaluation.C++ program to find ASCII Code for Characters and numbers. C++ Program Write a Program to Enter Char or Number and Check its ASCII Code.
Applicative syntax-rules: macros that compose better. The syntax-rule macro system of R5RS does not seem to scale beyond simple macros.
It is very difficult to write macros that compose, to assemble complex macros from already written and tested components. C programming, exercises, solution: Write a program in C to find the factorial of a given number using pointers. A simple solution is to find all prime factors of both numbers, then find intersection of all factors present in both numbers.
Finally return product of elements in the intersection. An efficient solution is to use Euclidean algorithm which is the main algorithm used for this purpose.
The idea is, GCD of two numbers doesn’t change if smaller number is subtracted from a bigger number. I'm a learning programmer and I've run into a bit of a jumble. I am asked to write a program that will compute and display Fibonacci's Sequence by a user inputted start number and end number (ie.
startNumber = 20 endNumber = and it will display only the numbers between that range). Code for Prolog program to find factorial of given number in Artificial Intelligence predicates start find_factorial(real,real) goal clearwindow, start.