extern int sprintf(char * buf, const char *fmt, ...);
extern int vsprintf(char *buf, const char *fmt, va_list args);
extern long simple_strtol(const char *cp,char **endp,unsigned int base);
extern int sprintf(char * buf, const char *fmt, ...);
extern int vsprintf(char *buf, const char *fmt, va_list args);
extern long simple_strtol(const char *cp,char **endp,unsigned int base);