'function' : cannot convert from 'double' to 'wchar_t *'

Question

I am trying to compile in visual studio 2010, and this is the exact error I get:

Error 65 error C2440: 'function' :
       cannot convert from 'double' to 'const wchar_t *'    

The offending line being:

swprintf(subbuf[num], L"%f\0", va_arg(args, double));

This is supposed to compile cleanly so code changes are not recommended. Am I missing any compiler option which might resolve this?

EDIT:

Here is the declaration of subbuf:

#define GDB_CHAR wchar_t
GDB_CHAR subbuf[MAX_SUBS][STATUS_MSG_LEN+1] ;

Also, regarding the size argument, I also checked the documentation page, however, compiler doesn't throw an error on

swprintf(subbuf[num], L"%c\0", va_arg(args, int));

So it has no issues in converting from int to wchar_t * and the function's arguments are ok.

If this is still not informative enough, please comment and direct me to any other you guys need. Thanks

Answer 1

A quick glance at the documentation shows that the function requires an argument specifying the size of the output string, which you have omitted.