Posts Tagged Scriere postfixata

How to: Transform a Mathematical Expression from Infix Writing to Postfix Writing in C++

Posted by Marius in C++, Data Structures on February 28, 2010

Postfix writing (Reverse Polish Form) was made by Polish mathematician Jan Łukasiewicz. Particularities of this form of writing mathematical expressions are presented in [...].
An algorithm for transforming a writing mathematical expressions from infix to postfix writing was developed by Edsger Dijkstra (Dijkstra Shunting Algorithm).
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How to: Evaluate a Mathematical Expression in Postfix Writing in C++

Posted by Marius in C++, Data Structures on February 28, 2010

Postfix writing [...] is a form of representation of mathematical expressions in which arithmetic operatorsare written specified by operands.
Advantages of postfix writing over prefix and infix writing:

  • Highlights clear policy of making operations;
  • Brackets for forcing priority for implementing operators are not necessary;
  • Evaluations are easily performed by computer.

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Conversia unei expresii matematice din scrierea infixata in scrierea postfixata in C++

Posted by Marius in C++, Data Structures on November 14, 2009

Scrierea postfixata (forma poloneza inversa) a fost realizata de matematicianul de origine poloneza Jan Lukasiewicz. Particularitati ale acestei forme de scriere a expresiilor matematice sunt prezentate la [...].
Un algoritm de transformare a unei expresii matematice din scrierea infixata in scrierea postfixata a fost elaborat de Edsger Dijkstra (Dijkstra Shunting Algorithm).
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Evaluarea unei expresii matematice in scrierea postfixata in C++

Posted by Marius in C++, Data Structures on November 10, 2009

Scrierea postfixata (forma poloneza inversa) [...] este o forma de reprezentare a unei expresii matematice aritmetice in care operatorii sunt scrisi, specificati dupa operanzi.
Avantaje ale scrierii postfixate fata de scrierile prefixata si infixata:

  • Evidentierea clara a ordinii de efectuare a operatiilor;
  • Parantezele pentru fortarea prioritatii de aplicare a operatorilor nu mai sunt necesare;
  • Evaluarile sunt usor de efectuat cu ajutorul calculatorului.

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