3.1.5 TTF_SetError

void TTF_SetError(const char *fmt, ...)

This is the same as SDL_SetError, which sets the error string which may be fetched with TTF_GetError (or SDL_GetError). This functions acts like printf, except that it is limited to SDL_ERRBUFIZE(1024) chars in length. It only accepts the following format types: %s, %d, %f, %p. No variations are supported, like %.2f would not work. For any more specifics read the SDL docs.

int myfunc(int i) { TTF_SetError("myfunc is not implemented! %d was passed in.",i); return(-1); }

See Also:
3.1.6 TTF_GetError