CString、Char* ，char [20]、wchar_t、unsigned short轉化

CString strName;

char * pcName;

char cName[20];//1個字節,-128 到 127 或者 0 到 255

unsigned short sName;

ACHAR * paName；

TCHAR*ptName;

wchar_t *pwName;//2 或 4 個字節,一個寬字節:typedef wchar_t short int;

double dName；//8字節,+/- 1.7e +/- 308 (~15 個數字)

int nName;//4字節,-2147483648 到 2147483647

std::wstring wsName;

std::string ssName;

 

LPCTSTR 可當作CString 處理

LPCTSTR判空

LPCTSTR lpName;
if (lpName!= NULL && lpName[0] != _T('\0'))
{
	//不爲空;
}

 

(1)CString轉unsigned short：

CString strName;
unsigned short sName;

sName = _ttoi(strNAme);

（2）CString轉化char[20]

(3)CString轉TCHAR*

CString strName;
TCHAR*ptName;

ptName = strName.GetBuffer();

（4）char[20]轉化ACHAR*

char cName[20];
ACHAR * paName；

paName = _T("cName");

若以上操做無論用就定義一個CString，經過CString做爲中間量轉化

char cName[20];
CString strName;

strName = cName；

ACHAR * paName；
paName = strName.GetBuffer();

（5）CString轉化double、long

CString strName;
double dName；

dName = _tstof(strName);

CString strName;
long lName;

lName = _ttol(strName);

（6）CString轉化int

CString strName;
int nName;

nName = _ttoi(strName);

（7）int轉CString

int nName;
CString strName;

strName. Format(_T("%d"), nName);

（8）std::wstring轉CString

std::wstring wsName;
CString strName;

strName  = wsName.c_str();

(9)CString轉std::wstring

CString strName;
std::wstring wsName;

wsName = strName. GetString();

(10)std::string轉CString

std::string ssName;
CString strName;

strName = ssName.c_str()；

（11）CString轉std::string

CString strName;

CStringA stra( strName .GetBuffer(0));
std::string ssName(stra.GetBuffer(0));
stra.ReleaseBuffer();

unicode時，先轉爲非unicode. : 

CString strName;
std::string sstrConn;

sstrConn = CT2A(strConn.GetBuffer());

（12） std::string 轉化Char*

std::string ssName;
char * pcName = new char(20);
pcName  = ssName.data();
pcName  = ssName.c_str();

（13） CString轉wchar_t *

CString strName;
wchar_t *pwName;
pwName = strName.AllocSysString();

(14) wchar_t * 轉 char *

wchar_t* pwName= NULL;
MdStrToWCharPtr(pwName, strPathName);
int iSize = WideCharToMultiByte(CP_ACP, 0, pwName, -1, NULL, 0, NULL, NULL);
char *pcName = (char*)malloc(iSize*sizeof(char));
WideCharToMultiByte(CP_ACP, 0, pwName, -1, pcName , iSize, NULL, NULL);