Conversion between char * And wchar_t *

Most of the conversions between char * And wchar_t * in C ++ are tedious and not feasible. The following method is found in msdn. I think it is quite good:

 

SetChar *ConvertWchar_t *

Using the mbstowcs_s function in stdlib. H, you can use the following example to understand its usage:

 

Char * CSTR = "string to convert ";

Size_t Len = strlen (CSTR) + 1;

Size_t converted = 0;

Wchar_t * wstr;

Wstr = (wchar_t *) malloc (LEN * sizeof (wchar_t ));

Mbstowcs_s (& converted, wstr, Len, CSTR, _ truncate );

 

The result is that the wchar_t version of CSTR is stored in wstr.

 

SetWchar_t *ConvertChar *

Similar to the preceding method, use the wcstombs_s function in stdlib. H. For example:

 

Wchar_t * wstr = l "string to convert ";

Size_t Len = wcslen (wstr) + 1;

Size_t converted = 0;

Char * CSTR;

CSTR = (char *) malloc (LEN * sizeof (char ));

Wcstombs_s (& converted, CSTR, Len, wstr, _ truncate );

 

In this case, the content in wstr will be converted to Char and stored in CSTR.

 

In addition, you can use the stream method to convert the char * type to the wchar_t * type, but the conversion result will be the const type, similar methods cannot convert the wchar_t * type to the char * type.

 

Put (Const)Char *ConvertConst wchar_t *

You need to use the sstream header file:

 

Char * CSTR = "string to convert ";

Wstringstream WSS;

WSS <CSTR;

 

Call WSS. STR (). c_str (); to obtain the return value of the const wchar_t * type.

 

Although the stringstream stream cannot convert wchar_t * To char *, it can be used to convert the value type and string. For example:

 

Double D = 2734792.934f;

Stringstream SS;

SS <D;

 

Call ss. STR () to obtain the string type string "273479e + 006", as shown in the following figure:

 

String STR ("299792458 ");

Stringstream SS;

Long I = 0;

SS <STR;

SS> I;

At this time, I = 299792458.

 

From: http://blog.163.com/tianshi_17th/blog/static/4856418920085209414977/