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c# 获取串口设备的输入(unsigned char 和 char)

, LONG32, BOOL , INT System.Int32 __int64, INT64, LONGLONG System.Int64 unsigned char, UINT8, UCHAR ,..., unsigned int, UINT32, ULONG32, DWORD32, ULONG, DWORD, UINT System.UInt32 unsigned __int64, UINT64,...如果DLL中有一个函数的传人参数是一个指针的话，如： int __stdcall FunctionName(unsigned char *param2)这就当是DLL的一个函数说明，返回值是INT，传入参数是一个指针...，类型是unsigned char。...使用：已密码键盘获取密码输入为例函数说明：int __stdcall inputpassword(unsigned char *param) .NET中使用：声明： [DllImport("COM

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【错误记录】Android NDK 编译报错 ( no known conversion from ‘unsigned char ‘ to ‘const char ‘ )

std::string SearchCode(unsigned char* data,unsigned size){ 1> ^ 1>....*' to 'const char *' for 4th argument 1>std::string search_string(const char* module, unsigned begin...传入了 unsigned char* 类型的数据 ; std::string SearchCode(unsigned char* data,unsigned size){ std::string...char* 类型的数据强制转换为 const char* 类型 ; 修改后 : std::string SearchCode(unsigned char* data,unsigned size){...std::string SearchCode(unsigned char* data,unsigned size){ 1> ^ 1>1 warning generated

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c语言u8是什么_c语言中unsigned char什么意思

const vsc8; /* Read Only */ typedef unsigned long u32; typedef unsigned short u16; typedef unsigned...char u8; typedef unsigned long const uc32; /* Read Only */ typedef unsigned short const uc16; /*...Read Only */ typedef unsigned char const uc8; /* Read Only */ typedef volatile unsigned long vu32...; typedef volatile unsigned short vu16; typedef volatile unsigned char vu8; typedef volatile unsigned...volatile unsigned char const vuc8; /* Read Only */ Exported_types 类型定义 typedef int32_t s32 typedef

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wchar_t,wchar_t,wchat_t数组,char,char,char数组,std::string,std::wstring,CString 以及system(command)

用system("pause>nul") 就可以了 wchar_t*,wchar_t,wchat_t数组,char,char*,char数组,std::string,std::wstring,CString...--------------------------------- // 将单字符 string 转换为宽字符 wstring inline void Ascii2WideString( const std...::string& szStr, std::wstring& wszStr ) { int nLength = MultiByteToWideChar( CP_ACP, 0, szStr.c_str()...= 'A'; char tagChar[100] = {NULL}; CString cStr; std::string str; // 注：设置语言环境以便输出WideChar setlocale...* pChar = const_castchar*>(str.c_str()); cout << pChar << endl; // 注：char* 转换 string str = std::string

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如何把std::string当char *使用?

std::string使用很方便，但有时会碰到这样的问题，比如我们有一个结构体，内容如下所示： typedef struct _datainfo { int i; unsigned time...char buf[512]; string strData; memcpy(char*(buf), (char *)&stInfo, sizeof(stInfo)); strData = string(...(char *)buf); 其实我们忽略了一点，就是string也是用char *来保存数据内容的，而c_str()接口就返回了这个头指针。...与普通的字符串不同的是，它的长度并不是以/0结尾去判断的，而是通过成员变量里的size决定的，知道了这一样，我们就可以把string当char *来使用了。...string strData; strData.resize(sizeof(stInfo)); memcpy((char *)strData.c_str(), (char *)&stInfo, sizeof

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为什么std::string_view能解决std::string和char*的性能瓶颈？

C++提供了std::string和char*两种字符串类型。然而，在某些场景下，它们可能会带来性能问题或设计上的局限性。为了解决这些问题，C++17 引入了 std::string_view。...背景 std::string和char*存在瑕疵，才引入的std::string_view。...那std::string_view解决了std::string和char*的什么问题呢不必要的内存复制：当 std::string 被传递给函数时，通常会发生一次深拷贝操作，即复制整个字符串内容。...使用 const char* 传递：使用 const char* 作为参数类型，可以避免不必要的复制。...; std::string_view view(cstr); // 使用 string_view，避免了 char* 的长度问题 std::cout << "String View: "

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Mac 使用 OpenMPClang

(char const*)", referenced from: std::__1::vectorstd::__1::vectorstd::__1::allocator&) in seq-3efcea.o "std::__1::basic_stringchar, std::__1::char_traitschar>, std...::__1::allocatorchar> >::__init(char const*, unsigned long)", referenced from: _main in seq-3efcea.o..."std::__1::basic_stringchar, std::__1::char_traitschar>, std::__1::allocatorchar> >::insert(unsigned...::__1::char_traitschar>, std::__1::allocatorchar> >::~basic_string()", referenced from: _main

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ClickHouse和他的朋友们（2）MySQL Protocol和Read调用栈

获取数据源 StorageSystemNumbers 数据源： DB::StorageSystemNumbers::read(std::__1::vectorstd::__1::basic_string...::__1::shared_ptr const&, std::__1::vectorstd::__1::basic_stringchar, std::__1::char_traits...__1::vectorstd::__1::basic_stringchar, std::__1::char_traitschar>, std::__1::allocatorchar> >, std...Pipeline执行 DB::LimitTransform::prepare(std::__1::vectorunsigned long, std::__1::allocatorunsigned long...> > const&, std::__1::vectorunsigned long, std::__1::allocatorunsigned long> > const&) LimitTransform.cpp

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利用自定义智能指针析构函数实现自动回收的内存池

unsigned char> Malloc(size_t size) { unsigned char* ptr = nullptr; // 如果大于1024字节就直接...== nullptr) {return nullptr;} // 自定义智能指针析构 return std::shared_ptrunsigned char...>(ptr, [this](unsigned char* p) { free(p); }); } std::unique_lock...::vectorunsigned char*> freeConn_; std::mutex lock_;};gtest测试代码#include #include "...::vectorstd::shared_ptrunsigned char>> vecs; for (int i=0;i<2000;++i) { auto p = pool.Malloc

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OpenCV图像匹配算法之sift

const std::vectorstd::vector >& matches, std::vectorstd::vectorstd::vector >& matches, std::vectorchar>(i)+3*j) = *(img1.ptrunsigned char>(i)+3*j); *(img_com.ptrunsigned char>(i)+3*j+1)...= *(img1.ptrunsigned char>(i)+3*j+1); *(img_com.ptrunsigned char>(i)+3*j+2) = *(img1.ptrunsigned char>(i)+3*j+2); } else { *(img_com.ptrunsigned char>(i)+3*j) = *

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【SQLite】C++链接SQLite读数据乱码问题(非中文)

具体问题: sqlite3_column_text的返回值为 const unsigned char*，于是我用const unsigned char*存，具体代码如下: //如果返回SQLITE_ROW...::string m_db_path; sqlite3_stmt* m_stmt; std::vectorstd::vectorunsigned char *> > m_data_array...; std::vectorunsigned char *> m_tmp; 查出来的几个字段值先存到m_tmp中，然后在放入m_data_array....get_result()函数声明 std::vectorstd::vectorunsigned char *> > get_result(); //获取结果集开始我以为是编码问题，于是我搜索...然后我抱着试一试的心态，将sqlite3_column_text 的返回值(const unsigned char*)强转成char*,然后用string类型的vector来存，并且读取，就成功了。

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EX2: 用CImg改写canny算法 EX2

1. canny.h #ifndef _CANNY_ #define _CANNY_ #include "CImg.h" #include vector> using namespace std;...CImgunsigned char> toGrayScale(); vectorvector > createFilter(int, int, double); /.../Creates a gaussian filter CImgunsigned char> useFilter(CImgunsigned char>, vectorvector using namespace std; canny::canny(char const* filename) { CImgunsigned char> temp(filename);...char> canny::useFilter(CImgunsigned char> img_in, vectorvector> filterIn) { int size =

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谷歌开源项目Google Preview Image Extractor(PIEX) (附上完整demo代码)

ifs.good()) { buffer.clear(); bufferSize = 0; return; } std::vectorunsigned char> curBuffer...; bufferSize = buffer.size(); } FileStream(std::vectorunsigned char>& abuffer) { int bufsize...{ unsigned char *readOffset = &buffer[offset]; unsigned char *endBuffer = &buffer[bufferSize -...::vectorunsigned char>& GetBuffer() { return buffer; } protected: std::vectorunsigned char> buffer...::vectorchar> previewBuffer; std::vectorchar> previewThumbnail; try { double costTime = bench

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TCP：多人聊天窗口（1）

}, }; void InfoInit() { std::vectorunsigned short> club_1(str_Club[0],str_Club[0]+3); std::vector...::mapunsigned short,int>threadBind; std::mapunsigned short,std::vectorunsigned short> >map_club;...int GetSockID(unsigned short usID); std::vectorunsigned short> GetClubVector(unsigned short usClubID...); std::vectorunsigned short> GetClubVector(unsigned short usClubID) { return map_club[usClubID]; }...std::pairunsigned short,int> it; std::vectorunsigned short> vec_clubNumber; char Buf_Msg[280] =

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Tcp多人聊天窗口：MFC客户端（2）

基础逻辑和单人聊天一样， void ClubNumberInit(std::vectorunsigned short> vec_list); //人员列表初始化 afx_msg void OnBnClickedButton1...short usID,std::vectorunsigned short> m_list); //元素寻找 CListBox m_ListBox;//用户List CListBox m_ClubListbox...;//群组List std::vectorunsigned short> m_NumberListBuf;//用户ID缓冲区 std::vectorunsigned short> m_ClubListBuf...::mapunsigned short,std::vectorunsigned short>>::iterator it; for ( it = m_config.map_Club.begin()...short usID,std::vectorunsigned short> m_list) { std::vectorunsigned short>::iterator iter_find =

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boost::string or boost::regex

* vFileName) { std::vectorstd::string> StrVec; preprocess(vFileName, StrVec); /*for (int i=0;...* vFileName, std::vectorstd::string>& voStrVec) { std::ifstream Ifs(vFileName); if (!...::vectorstd::string>& vStrVec) { std::mapstd::string, int> DataMap; for (unsigned int i=0; i Split_String_Itearor; Split_String_Itearor Bgn, End; std::vectorstd::string> StrVec; for (Bgn...::string& vFileName, unsigned int& voA, unsigned int& voB, unsigned int& voC) { std::string Content;

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C++实现图片格式转换

例如下面我举例子为YUV转BMP的：#include #include #include vector>// 保存YUV数据的结构体struct YUVData...{ std::vectorunsigned char> y; std::vectorunsigned char> u; std::vectorunsigned char> v;...for (int y = data.height - 1; y >= 0; --y) { for (int x = 0; x unsigned...char Y = data.y[y * data.width + x]; unsigned char U = data.u[(y / 2) * (data.width / 2)...+ (x / 2)]; unsigned char V = data.v[(y / 2) * (data.width / 2) + (x / 2)]; //

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深度剖析 C++17 中的 std::byte：解锁字节级编程新境界

彼时，通常使用char、unsigned char或std::uint8_t等类型来应对。然而，这些类型都有其“本职”含义。char，从名字就能直观感受到，它主要用于表示字符，肩负着文本处理的重任。...std::byte是一个基于unsigned char的强类型枚举类型。这意味着它有着独特的“身份”。...显式转换为unsigned char虽然std::byte对隐式转换说“不”，但它也不是完全封闭的。它可以显式转换为unsigned char或char，以便进行必要的字节操作或输出。...例如：std::byte b = std::byte{0xAB};unsigned char uc = static_castunsigned char>(b);这就像是给字节数据穿上了一件合适的“外衣...// 显式转换为unsigned char进行输出 std::cout unsigned char>(result) std

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SPlisHSPlasHSimulatorSimulatorBase.cpp

int numberOfFluidModels = static_castunsigned int>(fluidIDs.size()); std::vectorstd::vectorVector3r...::mapstd::string, unsigned int> &fluidIDs, std::vectorstd::vectorVector3r>> &fluidParticles, std::...::vectorVector3r> &vertices = bm->getRigidBodyObject()->getVertices(); const std::vectorunsigned...::vectorVector3r> &x, std::vectorunsigned int> &faces, const Utilities::SceneLoader::BoundaryData *...::vectorVector3r> &x, std::vectorunsigned int> &faces, const Utilities::SceneLoader::BoundaryData *

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无法解析的外部符号 “__declspec(dllimport)

int const std::basic_stringchar,struct std::char_traitschar>,class std::allocatorchar> >::npos" (...std::char_traitschar>,class std::allocatorchar> >(struct std::basic_stringchar,struct std::char_traits...1_Container_base@std@@QAE@XZ)，该符号在函数 "public: __thiscall std::_Vector_valstd::pairstd::numeric_limitsunsigned int>::min(void)" (__imp_?..._Orphan_all@_Container_base@std@@QBEXXZ)，该符号在函数 "protected: void __thiscall std::vectorstd::pair

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点击加载更多

c# 获取串口设备的输入(unsigned char 和 char)

【错误记录】Android NDK 编译报错 ( no known conversion from ‘unsigned char ‘ to ‘const char ‘ )

c语言u8是什么_c语言中unsigned char什么意思

wchar_t,wchar_t,wchat_t数组,char,char,char数组,std::string,std::wstring,CString 以及system(command)

如何把std::string当char *使用?

为什么std::string_view能解决std::string和char*的性能瓶颈？

Mac 使用 OpenMPClang

ClickHouse和他的朋友们（2）MySQL Protocol和Read调用栈

利用自定义智能指针析构函数实现自动回收的内存池

OpenCV图像匹配算法之sift

【SQLite】C++链接SQLite读数据乱码问题(非中文)

EX2: 用CImg改写canny算法 EX2

谷歌开源项目Google Preview Image Extractor(PIEX) (附上完整demo代码)

TCP：多人聊天窗口（1）

Tcp多人聊天窗口：MFC客户端（2）

boost::string or boost::regex

C++实现图片格式转换

深度剖析 C++17 中的 std::byte：解锁字节级编程新境界

SPlisHSPlasHSimulatorSimulatorBase.cpp

无法解析的外部符号 “__declspec(dllimport)

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