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Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
... It is the same idea as the 1-D case. What looks like a 2-D array in C and C++ is actually a 1-D array, each element of which is another 1-D array. In this case we have an array with 10 elements, each element of which is "array of 20 ints". As described in my post, what actually gets passed to the...
how does array[100] = {0} set the entire array to 0?
...nd recursively applies this to aggregates).
The behavior of this code in C++ is described in section 8.5.1.7 of the C++ specification (online draft of C++ spec): the compiler aggregate-initializes the elements that don't have a specified value.
Also, note that in C++ (but not C), you can use an e...
Remove spaces from std::string in C++
What is the preferred way to remove spaces from a string in C++? I could loop through all the characters and build a new string, but is there a better way?
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“std::endl” vs “\n”
Many C++ books contain example code like this...
12 Answers
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C++ static virtual members?
Is it possible in C++ to have a member function that is both static and virtual ? Apparently, there isn't a straightforward way to do it ( static virtual member(); is a compile error), but is there at least a way to achieve the same effect?
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Passing references to pointers in C++
...ere's no reason I shouldn't be allowed to pass a reference to a pointer in C++. However, my attempts to do so are failing, and I have no idea why.
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How well is Unicode supported in C++11?
I've read and heard that C++11 supports Unicode. A few questions on that:
5 Answers
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c++11 Return value optimization or move? [duplicate]
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GCC documentation on -fno-elide-constructors: "The C++ standard allows an implementation to omit creating a temporary that is only used to initialize another object of the same type. Specifying this option disables that optimization, and forces G++ to call the copy constructo...
Determining 32 vs 64 bit in C++
I'm looking for a way to reliably determine whether C++ code is being compiled in 32 vs 64 bit. We've come up with what we think is a reasonable solution using macros, but was curious to know if people could think of cases where this might fail or if there is a better way to do this. Please note we ...
What does “dereferencing” a pointer mean?
...rested in the pointed-to object's (current) value - I focus below on C and C++.
A pointer scenario
Consider in C, given a pointer such as p below...
const char* p = "abc";
...four bytes with the numerical values used to encode the letters 'a', 'b', 'c', and a 0 byte to denote the end of the tex...