Posts Tagged Expresie
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.
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.
How to: Define and Access a Variable in VB.NET
A variable corresponds to a location of memory, which stores values when performing calculations.
Variables are used in calculations, comparisons. They have established a name in the source program, and accessing the value stored in memory location is achieved by variable name.
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Mecanisme de transfer a argumentelor unei proceduri in VB.NET
O procedura [...] este invocata, apelata, intr-un context dat. Procedura executa secventa de cod sursa in mod repetat, utilizand date diferite la fiecare invocare a sa. Datele utilizate sunt reprezentate de variabile [...], constante si expresii transferate in procedura.
Parametrul reprezinta o valoare pe care procedura o asteapta la momentul invocarii. Definirea unei proceduri presupune si eventuala definire a listei de parametri.
Argumentul reprezinta valoarea furnizata parametrului procedurii la momentul invocarii acesteia. Argumentele reprezinta elemente cu valori diferite pentru invocari diferite ale procedurii.
Transmiterea mesajului asociat unui eveniment definit in VB.NET
Aparitia unui eveniment si transmiterea mesajul asociat acestuia se realizeaza prin specificatia RaiseEvent.
Specificatia RaiseEvent este utilizata doar pentru evenimente declarate explicit.
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Caracteristici ale evenimentelor in VB.NET
Evenimentul reprezinta un mesaj transmis de catre un obiect si care anunta aplicatia de producerea unui fapt.
Evenimentele sunt implementate folosind delegati [...].
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Definirea si referirea unei variabile VB.NET
O variabila corespunde unei locatii de memorie, care stocheaza valori la momentul efectuarii de calcule.
Variabilele sunt utilizate in calcule, comparatii. Ele au o denumire stabilita in program sursa, iar accesarea valorii stocate in locatia de memorie se realizeaza prin denumirea variabilei.
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YAHOO TECH NEWS- Cyberplex unit to pay $4.8 million to Yahoo for poor traffic
(Reuters)Reuters - Cyberplex Inc said its debt-laden unit Tsavo Media is required to pay Yahoo Inc $4.8 million for what the U.S. search company called "low quality traffic" from ads on Tsavo-run websites last year. […]
- Verizon to set up streaming service with Redbox
(AP)AP - Phone company Verizon Communications Inc. will challenge Netflix and start a video streaming service this year with Redbox and its DVD rental kiosks. […]
- Android’s internal rivalry caused HTC’s downfall
(Appolicious)Appolicious - It doesn’t always pay to be a first mover. When Android first hit the market, it was HTC that had enough faith in Google’s initial OS to manufacture handsets, but two year’s later the inaugural Android device maker has fallen to increasing competition within the Android community. Today HTC reported a 26 percent drop in fourth quarter profits, […]
- Cyberplex unit to pay $4.8 million to Yahoo for poor traffic
(Reuters)
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