char* strnlwr (char* start ,int n);
char* strnupr (char* start, int n);
char* strnlwr (char* start ,int n);
char* strnupr (char* start, int n);
int vsnprintf (char *str, size_t, char const *format, va_list args);
#endif
int vsnprintf (char *str, size_t, char const *format, va_list args);
#endif