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Why doesn't Java support unsigned ints?
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In C++ you have to sprinkle static_casts around much to mix them. It is indeed messy.
– Raedwald
Aug 2 '11 at 12:40
4
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What is a bus error?
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In my case, a method static_casted a void * parameter to an object that stores a callback (one attribute points to the object and the other to the method). Then the callback is called. However, what was passed as void * was something completely d...
Elegant solution to duplicate, const and non-const, getters? [duplicate]
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static_cast<const Foo*>(this) should be const_cast<const Foo*>(this).
– ildjarn
Aug 10 '11 at 21:13
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How to easily map c++ enums to strings
...sh_back(temp.str()); \
os << enumName << "::" << strings[static_cast<int>(value)]; \
return os;}
To use it in your code, simply do:
AWESOME_MAKE_ENUM(Animal,
DOG,
CAT,
HORSE
);
auto dog = Animal::DOG;
std::cout<<dog;
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ListCtrl 重绘（Custom Draw） - C/C++ - 清泛网 - 专注C/C++及内核技术
... with the highlight color).
LVITEM rItem;
int nItem = static_cast<int>( pLVCD->nmcd.dwItemSpec );
// Get the image index and state of this item. Note that we need to
// check the selected state manually. The docs _say_ that the
// item's state is...
When should you use 'friend' in C++?
... are a
// base-class of Derived.
some_type const& t = static_cast<Derived*>(this)->getSomething();
}
};
// note, derived privately
template<template<typename> class SomePolicy>
struct FlexibleClass : private SomePolicy<FlexibleClass> {
// we d...
What does the explicit keyword mean?
... a3(1);
A a4 = A("Venditti");
A* p = new A(1);
A a5 = (A)1;
A a6 = static_cast<A>(1);
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Fastest way to determine if an integer is between two integers (inclusive) with known sets of values
...above:
int inBetween2{ 0 };
for (int i = 1; i < MaxNum; ++i)
{
if (static_cast<unsigned>(num - randVec[i - 1]) <= (randVec[i] - randVec[i - 1]))
++inBetween2;
}
Pay attention that randVec is a sorted vector. For any size of MaxNum the first method beats the second one on m...
Weighted random numbers
...andom number using gen, distributed according to dist
unsigned r = static_cast<unsigned>(dist(gen));
// Sanity check
assert(interval[0] <= r && r <= *(std::end(interval)-2));
// Save r for statistical test of distribution
avg[r - 1]++;
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Generating random integer from a range
...ill not properly uniform distributed solution is
output = min + (rand() % static_cast<int>(max - min + 1))
Except when the size of the range is a power of 2, this method produces biased non-uniform distributed numbers regardless the quality of rand(). For a comprehensive test of the quality...