Decimal To Hex(十进制转十六进制)// Use _itoa( ) function and set radix to 16.char hexstring[10]; int number = 30;itoa( number, hexstring, 16);// In hexstring is 1e.Hex To Decimal(十六进制转十进制)// You can use strtol function and you can specify base. char * hexstring= "ABCDEF";char * p;int number = strtol(hexstring, &p,16);// A function that does thisbool HexToDecimal (char* HexNumber, int& Number)...{ char* pStopString; Number = strtol (HexNumber, &pStopString, 16); return (bool)(Number != LONG_MAX);}Decimal to time(十进制转时间类型)char *DecToTime(float fTime, char *szTime)...{ int nHrs, nMin, nSec; fTime *= 3600; nHrs = (int)fTime / 3600; nMin = (int)(fTime - nHrs * 3600) / 60; nSec = (int)(fTime - nHrs * 3600 - nMin * 60); wsprintf(szTime, "%02d.%02d.%02d Hrs.Min.Sec.", nHrs, nMin, nSec); return szTime;}String Conversions(字符串转换)String to Hex(字符串转十六进制)sscanf(string, %04X, &your_word16);// where string = your string and // 04 = length of your string and X = hexHex to CString(十六进制转字符串)CString Str;unsigned char Write_Buff[1];Write_Buff[0] = 0x01;Str.Format("0x0%x",Write_Buff[0]);COleVariant to CStringCString strTemp;COleVariant Var;Var = "FirstName";strTemp = Var.bstrVal;AfxMessageBox(strTemp);CString to char pointerCString MyString = "ABCDEF";char * szMyString = (char *) (LPCTSTR) MyString;char *pBuffer = new char[1024];CString strBuf = "Test";pBuffer = strBuf.GetBuffer(sizeof(pBuffer));char pointer to CStringchar * mystring = "12345";CString string = mystring;Double to CString including the fractional partCString strValue,strInt, strDecimal;int decimal,sign;double dValue = 4.125;strValue = _fcvt(dValue,6,&decimal,&sign); // Now decimal contains 1 because there is // only one digit before the .strInt = strValue.Left(decimal); // strInt contains 4strDecimal = strValue.Mid(decimal); // strDecimal contains 125CString strFinalVal;strFinalVal.Format("%s.%s",strInt,strDecimal); // strFinalVal contains 4.125Double To CStringCString strValue;int decimal,sign;double dValue = 123456789101112;strValue = _ecvt(dValue,15,&decimal,&sign);CString To DoublestrValue = "121110987654321";dValue = atof(strValue);CString to LPCSTRCString str1 = _T("My String");int nLen = str1.GetLength();LPCSTR lpszBuf = str1.GetBuffer(nLen);// here do something with lpszBuf...........str1.ReleaseBuffer();CString to LPSTRCString str = _T("My String");int nLen = str.GetLength();LPTSTR lpszBuf = str.GetBuffer(nLen);// here do something with lpszBuf...........str.ReleaseBuffer();CString to WCHAR*CString str = "A string here" ;LPWSTR lpszW = new WCHAR[255];LPTSTR lpStr = str.GetBuffer( str.GetLength() );int nLen = MultiByteToWideChar(CP_ACP, 0,lpStr, -1, NULL, NULL);MultiByteToWideChar(CP_ACP, 0, lpStr, -1, lpszW, nLen);AFunctionUsesWCHAR( lpszW );delete[] lpszW;LPTSTR to LPWSTRint nLen = MultiByteToWideChar(CP_ACP, 0, lptStr, -1, NULL, NULL);MultiByteToWideChar(CP_ACP, 0, lptStr, -1, lpwStr, nLen);string to BSTRstring ss = "Girish";BSTR _bstr_home = A2BSTR(ss.c_str());CString to BSTRCString str = "whatever" ;BSTR resultsString = str.AllocSysString(); _bstr_t to CString#include <ANSIAPI.H>#include <comdef.h>_bstr_t bsText("Hai Bayram");CString strName;W2A(bsText, strName.GetBuffer(256), 256);strName.ReleaseBuffer();AfxMessageBox(strName);char szFileName[256];GetModuleFileName(NULL,szFileName,256);AfxMessageBox(szFileName);Character arraysChar array to integerchar MyArray[20];int nValue;nValue = atoi(MyArray);Char array to floatchar MyArray[20];float fValue;fValue = atof(MyArray);Char Pointer to doublechar *str = " -343.23 "; double dVal; dVal = atof( str );Char Pointer to integerchar *str = " -343.23 "; int iVal;iVal = atoi( str );Char Pointer to longchar *str = "99999"; long lVal; lVal = atol( str );Char* to BSTRchar * p = "whatever";_bstr_t bstr = p;Float to WORD and Vice Versafloat fVar;WORD wVar;fVar = 247.346;wVar = (WORD)fVar; //Converting from float to WORD. //The value in wVar would be 247wVar = 247;fVar = (float)fVar; //Converting from WORD to float. //The value in fVar would be 247.00