#include <Windows.h> LPCSTR CStringToLPCSTR(const char* cString) { // 获取C-String的长度 int length = strlen(cString); // 获取所需缓冲区大小 int bufferSize = MultiByteToWideChar(CP_ACP, 0, cString, length, NULL, 0); // 分配缓冲区 WCHAR* wideString = new WCHAR[bufferSize]; // 转换C...
在C++中,将std::string转换为const char*(C-style字符串)有多种方法。以下是一些常见的方法: 使用std::string::c_str()成员函数: 代码语言:cpp 复制 std::string str = "Hello, world!"; const char* cstr = str.c_str(); 使用std::string::data()成员函数: 代码语言:cpp 复制 std::string str ...
CString convert(BSTR b) { CString s; if(b == NULL) return s; // empty for NULL BSTR #ifdef UNICODE s = b; #else LPSTR p = s.GetBuffer(SysStringLen(b) + 1); ::WideCharToMultiByte(CP_ACP, // ANSI Code Page 0, // no flags b, // source widechar string -1, // assume NUL...
Compiler warning (level 1, off) C4905wide string literal cast to 'LPSTR' Compiler warning (level 1, off) C4906string literal cast to 'LPWSTR' Compiler warning (Error) C4907multiple calling conventions cannot be specified; last given will be used ...
buf = (LPSTR)(LPCTSTR)str; BSTR类型的_variant_t变量 v1 = (_bstr_t)"程序员"; buf = _com_util::ConvertBSTRToString((_bstr_t)v1); 三、字符串转换为其它数据类型 strcpy(temp,"123"); 短整型(int) i = atoi(temp); 长整型(long) ...
sequence of 8 hex digits. To convert a word to 8 hex digits each 4-bit string is converted to its hex equivalent as described in (a) above. Example: 1010 0001 0000 0011 1111 1110 0010 0011 = A103FE23. c. An integer between 0 and 2^32 - 1 inclusive may be represented as ...
char *转换到BSTR可以这样: BSTR b=_com_util::ConvertStringToBSTR("数据"); //使用前需要加上头文件comutil.h 反之可以使用char *p=_com_util::ConvertBSTRToString(b); 2、VARIANT、_variant_t与COleVariant VARIANT:的结构可以参考头文件VC98/Include/OAIDL.H中关于结构体tagVARIANT的定义。对于VARIANT变量...
char *buf = _com_util::ConvertBSTRToString(bstrVar.m_str); AfxMessageBox(buf); delete(buf); 7。_bstr_t变量 _bstr_t类型是对BSTR的封装,因为已经重载了=操作符,所以很容易使用 _bstr_t bstrVar("test"); const char *buf = bstrVar;///不要修改buf中的内容 ...
}int main(){ float input = 0.0; const int numeroDeBits = 32; char *str = (char*)malloc(sizeof(char) * numeroDeBits); printf("Type a float number to convert to binary: "); scanf("%f", &input); floatToBinary(input, str, numeroDeBits); printf("%s\n", str); if(str != NULL...
void convertToXXX() { BYTE i; XXX = 0; for (i = 0; i 《 NUM_LENGTH; i++) { XXX += inputElement.byNum*power(2, NUM_LENGTH - i - 1); } } 反之,我们也可能需要在屏幕上显示那些有效的数据位,因为我们也需要能够反向转化: /* 从有效数据转化为2进制数据位:XXX */ void convertFromXXX...