大约有 118 项符合查询结果（耗时：0.0280秒） [XML]
Why should casting be avoided? [closed]
... can affect is whether an object is const, volatile, or not. Conversely, a static_cast is not allowed to affect whether an object is const or volatile. In short, you have most of the same types of capabilities, but they're categorized so one cast can generally only do one kind of conversion, where a...
C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...gin(),v.end(),delAndNullifyUndertified);
v.erase(vemove(v.begin(),v.end(),static_cast<Widget*>(0)),v.end());
下面的的代码使用第二中方式：
template<typename T> //RSCP = "Reference Counting Smart Pointer"
class RCSP{...};
tpedef RCSP<Widget> RCSPW;
vector<RCSPW> v;
...
v.push_bac...
Is there a difference between copy initialization and direct initialization?
...on selects A::A(int, int)
A a5 = (A)1; // OK: explicit cast performs static_cast
// B b1 = 1; // error: copy-initialization does not consider B::B(int)
B b2(2); // OK: direct-initialization selects B::B(int)
B b3 {4, 5}; // OK: direct-list-initialization selects B::B(int...
使用CSplitterWnd实现拆分窗口（多视图显示） - C/C++ - 清泛网 - 专注C/C++及内核技术
...要求进行了划分和初始化
//获取主窗口
CMainFrame* pFrame=static_cast<CMainFrame*>(AfxGetMainWnd());
//获取某个view
CMyTreeView* pView=static_cast<CMyTreeView*>(pFrame->m_wndTopSplitter.GetPane(0,0));
//激活View
pFrame->SetActiveView(pView);
pFrame->m_wndTopSplitter.R...
What are the advantages of using nullptr?
...id doSomething(int);
void doSomething(char *);
int main()
{
doSomething(static_cast <char *>(0)); // Case 1
doSomething(0); // Case 2
doSomething(NULL) // Case 3
}
Analyzing the above snippet:
Case 1: calls doSomething(char *...
C++ convert hex string to signed integer
... ss >> x;
// output it as a signed type
std::cout << static_cast<int>(x) << std::endl;
}
In the new C++11 standard, there are a few new utility functions which you can make use of! specifically, there is a family of "string to number" functions (http://en.cpprefer...
Easiest way to convert int to string in C++
...ral header of my C++ sources:
#include <sstream>
#define SSTR( x ) static_cast< std::ostringstream & >( \
( std::ostringstream() << std::dec << x ) ).str()
Usage is as easy as could be:
int i = 42;
std::string s = SSTR( "i is: " << i );
puts( SSTR( i )....
Program only crashes as release build — how to debug?
...caused by a buffer overflow, caused a single byte difference:
char *end = static_cast<char*>(attr->data) + attr->dataSize;
This is a fencepost error (off-by-one error) and was fixed by:
char *end = static_cast<char*>(attr->data) + attr->dataSize - 1;
The weird thing was...
hash function for string
...nst size_t m = 0x5bd1e995;
size_t hash = seed ^ len;
const char* buf = static_cast<const char*>(ptr);
// Mix 4 bytes at a time into the hash.
while (len >= 4)
{
size_t k = unaligned_load(buf);
k *= m;
k ^= k >> 24;
k *= m;
hash *= m;
hash ^= k;
b...
round() for float in C++
...e destination type.[...]
For example:
float myround(float f)
{
return static_cast<float>( static_cast<unsigned int>( f ) ) ;
}
Given std::numeric_limits<unsigned int>::max() is 4294967295 then the following call:
myround( 4294967296.5f )
will cause overflow, (see it live...