string - Why is the following C++ code printing only the first character? -

i trying convert char string wchar string.

in more detail: trying convert char[] wchar[] first , append " 1" string , print it.

char src[256] = "c:\\user";  wchar_t temp_src[256]; mbtowc(temp_src, src, 256);  wchar_t path[256];  stringcbprintf(path, 256, _t("%s 1"), temp_src); wcout << path; 

but prints c

is right way convert char wchar? have come know of way since. i'd know why above code works way does?

mbtowc converts single character. did mean use mbstowcs?

typically call function twice; first obtain required buffer size, , second convert it:

#include <cstdlib> // mbstowcs  const char* mbs = "c:\\user"; size_t requiredsize = ::mbstowcs(null, mbs, 0); wchar_t* wcs = new wchar_t[requiredsize + 1]; if(::mbstowcs(wcs, mbs, requiredsize + 1) != (size_t)(-1)) {     // what's needed wcs string } delete[] wcs; 

if rather use mbstowcs_s (because of deprecation warnings), this:

#include <cstdlib> // mbstowcs_s  const char* mbs = "c:\\user"; size_t requiredsize = 0; ::mbstowcs_s(&requiredsize, null, 0, mbs, 0); wchar_t* wcs = new wchar_t[requiredsize + 1]; ::mbstowcs_s(&requiredsize, wcs, requiredsize + 1, mbs, requiredsize); if(requiredsize != 0) {     // what's needed wcs string } delete[] wcs; 

make sure take care of locale issues via setlocale() or using versions of mbstowcs() (such mbstowcs_l() or mbstowcs_s_l()) takes locale argument.