Questions about C++, a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language.

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2
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3answers
613 views

Is C++0x Compatible with C?

I have heard that there will be a lot of changes done in C++ because of the new standard (C++0x). My question is: What are the major changes, and will C++0x be compatible with C++ 98 and C ?
1
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1answer
285 views

Why does this algorithm work in O(n m)?

This is from a blog post on Codeforces. I couldn't really understand why the editorialist goes on to claim that this code works in O(n m) This is a graph problem, where we are supposed to find the ...
1
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1answer
288 views

Implementation of instance testing in Java, C++, C#

For curiosity purposes as well as understanding what they entail in a program, I'm curious as to how instance testing (instanceof/is/using dynamic_cast in c++) works. I've tried to google it ...
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3answers
467 views

How to make a random-access archive of text files?

I wrote an application that tests the performance of evolutionary algorithms. This application performs a run of the algorithm which consists of several generations. The data which is produced by my ...
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3answers
433 views

Better style for member variables?

class awesomeClass { std::list<A> myList; //... void fillList(); }; awesomeClass::awesomeClass() { fillList(); } void awesomeClass::fillList(){ //... foreach(A a, ...
1
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3answers
6k views

Two-Dimensional vector in C++ – inefficient with dynamic-sized sub vectors?

I know that std::vector uses a contiguous block of memory, but I often see people use vectors of vectors, even when they modify the number of elements in these vectors contained within an outer ...
1
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1answer
1k views

Big project with many external libraries - source code organisation

I was wondering what is the best way to organize my source code. I was researching on SO and found http://stackoverflow.com/a/1398594/137261 but this source code layout is library specific and doesn't ...
1
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1answer
615 views

Is this an implementation of the promise pattern?

I am writing a library in C++ (making use of many C++11 features) that (as far as I can tell) implements the promise pattern. The library consists of a class that makes asynchronous network requests. ...
1
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1answer
1k views

How can I implement a database TableView like thing in C++?

How can I implement a TableView like thing in C++? I want to emulating a tiny relation database like thing in C++. I have data tables, and I want to transform it somehow, so I need a TableView like ...
1
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3answers
1k views

Pattern for Accessing MySQL connection

We have an application which is C++ trying to access MySQL database. There are several (about 5 or so) threads in the application (with Boost library for threading) and in each thread has a few ...
0
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1answer
100 views

Is it a bad idea to use mutable for pre-allocated temporaries?

Let us assume I have the following C++ class: class MyFastMessageEncoder { public: MyFastMessageEncoder() : m_fieldEncoder(ENCODING_STYLE_DEFAULT) { } void ...
0
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3answers
284 views

C/C++ in applications that do not concern performance [closed]

C is the best language (or maybe the single language) suitable for operating systems, drivers, embedded systems etc. For more complex domains like computer graphics C++ is a better choice. But these ...
-2
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1answer
682 views

Bresenham Vs Midpoint Circle drawing algorithm

Can somebody explain the difference between Bresenham and Midpoint Circle drawing algorithms? All I am able to understand is that in both algorithms we compute coordinates of an octant instead of ...
-2
votes
4answers
3k views

Determining the winning condition for Tic-Tac-Toe [closed]

I'm writing a tic-tac-toe game in C++ and now I found a function to check if a player has a winning board for a connect four game. The function looks like this: bool haswon(int64_t board) { ...