By Brian W. Kernighan, Rob Pike
With an identical perception and authority that made their booklet The Unix Programming surroundings a vintage, Brian Kernighan and Rob Pike have written The perform of Programming to aid make person programmers more beneficial and productive.
The perform of programming is greater than simply writing code. Programmers also needs to verify tradeoffs, select between layout possible choices, debug and try, enhance functionality, and retain software program written via themselves and others. whilst, they need to be troubled with matters like compatibility, robustness, and reliability, whereas assembly specifications.
The perform of Programming covers these kinds of subject matters, and extra. This ebook is stuffed with useful recommendation and real-world examples in C, C++, Java, and numerous special-purpose languages. It comprises chapters on:
- debugging: discovering insects fast and methodically
- trying out: making certain that software program works adequately and reliably
- functionality: making courses swifter and extra compact
- portability: making sure that courses run all over with no change
- layout: balancing objectives and constraints to choose which algorithms and knowledge constructions are best
- interfaces: utilizing abstraction and knowledge hiding to regulate the interactions among components
- type: writing code that works good and is a excitement to read
- notation: opting for languages and instruments that allow the computer do extra of the paintings
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Additional resources for The Practice of Programming
Sample text
If an irrational number appears in a rational expression, MATLAB will approximate it by a fraction and then work with it in rational form. 5/7 + pi ans = 5626/1751 Another way to work with accurate results with rational numbers, without having to enable the rat format, is to use the command simplify. Using this command allows you to work with rational expressions exactly, even if the expressions contain irrational numbers. The use of this command requires that the numeric expressions be considered as symbolic, so you will need to prepend to all numeric expressions the command sym.
1, 1, 42, 1, 2, 1, 1, 1, 7, 6, 10, ... ], [1, 3, 3, 1, 1, 1, 3, 2, 3, 4, 1, ... ] >> pretty(sym(maple('cfrac(11/9999997)'))); ans = 1 -----------------------1 909090 + --------------1 1 + ----------1 1 + ------1 + 1/3 >> pretty(sym(maple('cfrac(31^(1/2))'))); ans = 1 5 + -------------------------------------------1 1 + ---------------------------------------1 1 + -----------------------------------1 3 + -------------------------------1 5 + ---------------------------1 3 + -----------------------1 1 + -------------------1 1 + ---------------1 10 + ----------1 1 + ------1 + ...
Maple('with(numtheory)'); >> maple mcombine(37,1000,53,1500) ans = 334 >> maple chrem([500,600,700],[3,4,5]) ans = 20 >> maple legendre(1000,37) ans = 1 >> maple order (1500,53) ans = 13 We therefore conclude that there is such an integer m. EXERCISE 2-15 Find the number of monic irreducible univariate polynomials of degree 3 over the ring Z (mod 17). Find the number of monic univariate irreducible polynomials of degree 5 over the Galois field of order 711. >> maple('with(numtheory)'); >> maple mipolys(3,17) ans = 1632 >> maple mipolys(5,7,11) ans = 6045360394355011189649410336790819322177683040 31 CHAPTER 2 N INTEGERS, DIVISIBILITY AND NUMBER SYSTEMS EXERCISE 2-16 Find the smallest generator of the cyclic group under multiplication modulo 1500 containing integers relatively prime with 1500.