By Bruno Petazzoni
Voici le prime livre de problГЁmes corrigГ©s d'informatique, destinГ© aux Г©tudiants qui suivent l'enseignement optionnel d'informatique en filiГЁre MPSI/MP (classes prГ©paratoires aux grandes Г©coles d'ingГ©nieurs). Ce livre intГ©ressera Г©galement les Г©tudiants en licence ou en maГ®trise d'informatique.
Chaque problГЁme est prГ©cГ©dГ© d'une rapide prГ©sentation, indiquant en particulier quelles sont les events du programme mises en jeu. Le corrigГ© est complet: chaque query y trouve une rГ©ponse. Des notes historiques et bibliographiques apportent des prГ©cisions complГ©mentaires, et donnent au lecteur curieux des pistes vers d'autres resources d' information.
Les rГ©ponses aux questions de programmation sont donnГ©es dans le langage de programmation fonctionnelle Caml, Г los angeles fois concis et Г©lГ©gant
Read or Download Seize problèmes d'informatique : Avec corrigés détaillés et programmes en Caml PDF
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Additional info for Seize problèmes d'informatique : Avec corrigés détaillés et programmes en Caml
Example text
For the simple examples above, the crucial difference between rewrite rules created with the SetDe layed and Set functions becomes apparent by querying the rule base for the rewrite rules associated with the symbols rand1 and rand2. In[16]:= ? 668693 A rewrite rule created using the Set function has the same left-hand side as the function that created it but the right-hand side of the rule may differ from the right-hand side of the function. This is because the right-hand side of the rule was evaluated at the moment the rule was first evaluated.
In[5]:= Out[5]= In[6]:= Out[6]= NumericQ True NumericQ False This is distinct from a related function, NumberQ, which evaluates to True whenever its argument is an explicit number (that is, has head one of Integer, Rational, Real, Complex). 2 True NumberQ False Many other predicates are available for testing if an expression is an atom, a list, a matrix, a polynomial, and much more. In[9]:= AtomQ "string" Out[9]= True In[10]:= ListQ Out[10]= In[11]:= Out[11]= In[12]:= Out[12]= In[13]:= Out[13]= a, b, c True MatrixQ 1 0 0 0 1 0 0 0 1 True 1 1 1 x x2 x3 PolynomialQ ,x False IntervalMemberQ Interval 3, 4 , True Relational and logical operators Another type of predicate that is commonly used in programming are relational operators.
A/b)[[2, 2]] 4. What is the part specification of the b in the expression a x^2 + b x + c? 2 Definitions Defining variables and functions One of the most common tasks in any programming environment is to define functions, constants, and procedures to perform various tasks. Sometimes a particular function that you need is not part of the built-in set of functions. Other times, you may need to use an expression over and over again and so it would be useful to define it once and have it available for future reference.