extern int vsnprintf(char *buf, size_t __maxlen, const char *format, va_list args);\r
extern int vsprintf(char *buf, const char *format, va_list args);\r
extern int sprintf(char *buf, const char *format, ...);\r
extern int vsnprintf(char *buf, size_t __maxlen, const char *format, va_list args);\r
extern int vsprintf(char *buf, const char *format, va_list args);\r
extern int sprintf(char *buf, const char *format, ...);\r