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Converting wchar_t to char???

Fri, 15 Jun 2007 12:24:19 -0800

How do you convert wchar_t to char?

because i get this error message:
error C2664: 'CComPort::Open' : cannot convert parameter 1 from 'wchar_t [4]' to 'char *'

Re: Converting wchar_t to char???

Sat, 16 Jun 2007 02:29:53 -0800

: How do you convert wchar_t to char?
:
: because i get this error message:
: error C2664: 'CComPort::Open' : cannot convert parameter 1 from
: 'wchar_t [4]' to 'char *'
You try to convert a wchar_t array to a char pointer. Be carefull wit this, as a wchar_t typically can hold more values than a char, so in the cast you might lose information! You can check this e.g. like this:

wchar_t wide = /* something */;
assert(wide >= 0 && wide < 256 &&);
char myChar = (char) wide; /* C style cast */

To convert a wchar_t array to a char pointer:

wchar_t myArray[4] = /* something */;
char * myPointer = (char*) &myArray[0];

Good luck,

bilderbikkel

Re: Converting wchar_t to char???

Sat, 16 Jun 2007 05:46:41 -0800

In most cases you can not make that conversion by simple typecasting as bilderbikkel is suggesting. You have to use one of several conversion functions, such as wcstombs()

wchar_t helloW[] = _TEXT("Hello World");
char helloA[20] = {0};
// now convert the string
wcstombs(helloA, helloW, wcslen(helloW)+1);

>>error C2664: 'CComPort::Open' : cannot convert parameter 1 from 'wchar_t [4]' to 'char *'

Depending on how you coded it you might be able to simply use one of the UNICODE macros as I did in the HelloWorldW example above. Just surround the literal text with the _TEXT macro. It only works with literals, not character arrays.

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