Irrlicht Engine

how can i convert C8 to INT

The conversion from c8 [or char as the rest of the world calls it] to int is implicit. You don't need to do anything.
If, on the other hand, you want to know how convert from a character string [c8* or c8[]] to integer, there are several ways. You could use the C library functions for type conversion atoi(), strtol() even sscanf().

Irrlicht also has a function strtol10() in fast_atof.h that you could use also, but it only works for unsigned values.

Travis

and c8* in wchar_t?

i think there's a function called swprintf which you could use to do that. Either way if you google converting char* to wchar_t* then you'll find out, or google swprintf to see if i'm right about that.

You'd use it something like this:

c8 cstr[5];
wchar_t wstr[50];
swprintf(wstr, 50, "%s", cstr);

If you want to avoid c type handling you can do core::stringw(c_string_pointer).c_str()

and const wchar_t * to c8*?

Search for "wcstomb".