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How can I get the list of files in a directory using C or C++?
How can I determine the list of files in a directory from inside my C or C++ code?
26 Answers
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Why isn't vector a STL container?
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For space-optimization reasons, the C++ standard (as far back as C++98) explicitly calls out vector<bool> as a special standard container where each bool uses only one bit of space rather than one byte as a normal bool would (implementing a kind of "dynam...
What are forward declarations in C++?
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Why forward-declare is necessary in C++
The compiler wants to ensure you haven't made spelling mistakes or passed the wrong number of arguments to the function. So, it insists that it first sees a declaration of 'add' (or any other types, classes or functions)...
What is the most effective way for float and double comparison?
...re function to sort items in a collection. (In this case using the builtin C++ operator == for doubles produced correct results.)
Like I said: it all depends on context and the expected size of a and b.
BTW, std::numeric_limits<double>::epsilon() is the "machine epsilon". It is the differen...
How to automatically generate a stacktrace when my program crashes
I am working on Linux with the GCC compiler. When my C++ program crashes I would like it to automatically generate a stacktrace.
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Size of Matrix OpenCV
...of rows in a 2D array.
mat.cols – Number of columns in a 2D array.
Or:
C++: Size Mat::size() const
The method returns a matrix size: Size(cols, rows) . When the matrix is more than 2-dimensional, the returned size is (-1, -1).
For multidimensional matrix, you need to use
int thisSizes[3] = {...
Superiority of unnamed namespace over static?
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You're basically referring to the section §7.3.1.1/2 from the C++03 Standard,
The use of the static keyword is
deprecated when declaring objects in a
namespace scope; the
unnamed-namespace provides a superior
alternative.
Note that this paragraph was already removed in C++...
Calling Python in Java?
...s why python is so kool! Having such high abstractions however access to c,c++ when needed. Imagine if you could have that in java. This question is not even worth asking if jython is ok because then it is easy anyway.
So I have played with the following methods, and listed them from easy to difficu...
Why do you program in assembly? [closed]
..., many modern 3-D Games have their high performance core engine written in C++ and Assembly.
Games (and most programs these days) aren't "written in assembly" the same way they're "written in C++". That blog isn't saying that a significant fraction of the game is designed in assembly, or that a t...
Why are Standard iterator ranges [begin, end) instead of [begin, end]?
...n; it <= end; ++it) { ... }
Since pointers to arrays are iterators in C++ (and the syntax was designed to allow this), it's much easier to call std::find(array, array + size, some_value) than it is to call std::find(array, array + size - 1, some_value).
Plus, if you work with half-closed ran...