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round() for float in C++
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It's available since C++11 in cmath (according to http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf)
#include <cmath>
#include <iostream>
int main(int argc, char** argv) {
std::cout << "round(0.5):\t" <<...
How slow are .NET exceptions?
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@PaulLockwood: I would say that if you've got 200+ exceptions per second, you're abusing exceptions. It's clearly not an "exceptional" event if it's occurring 200 times per second. Note the last sentence of the answer: "Basically, exceptions shouldn't happen often unless...
How to float 3 divs side by side using CSS?
...le:
<div style="width: 500px;">
<div style="float: left; width: 200px;">Left Stuff</div>
<div style="float: left; width: 100px;">Middle Stuff</div>
<div style="float: left; width: 200px;">Right Stuff</div>
<br style="clear: left;" />
</div>
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Checking for NULL pointer in C/C++ [closed]
...inct.
Edit: As SoapBox points out in a comment, they are compatible with C++ classes such as auto_ptr that are objects that act as pointers and which provide a conversion to bool to enable exactly this idiom. For these objects, an explicit comparison to NULL would have to invoke a conversion to po...
How do you declare an interface in C++?
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How typical of a C++ answer that the top answer doesn't directly answer the question (though obviously the code is perfect), instead it optimizes the simple answer.
– Tim
Aug 24 '12 at 22:49
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how to rotate a bitmap 90 degrees
...g.width();
int height = bitmapOrg.height();
int newWidth = 200;
int newHeight = 200;
// calculate the scale - in this case = 0.4f
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// createa matr...
What exactly does an #if 0 … #endif block do?
In C /C++
9 Answers
9
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Why does C++ rand() seem to generate only numbers of the same order of magnitude?
In a small application written in C/C++, I am facing a problem with the rand function and maybe the seed :
9 Answers
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Using switch statement with a range of value in each case?
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Suragch
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answered Jul 30 '14 at 6:32
JitendraJi...
What does a colon following a C++ constructor name do? [duplicate]
What does the colon operator (":") do in this constructor? Is it equivalent to MyClass(m_classID = -1, m_userdata = 0); ?
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