7 typedef unsigned int off_t
;
10 int puts(const char *);
11 int sprintf(char *buf
, const char *fmt
, ...);
12 int vsprintf(char *buf
, const char *fmt
, va_list args
);
13 int printf(const char *fmt
, ...);
21 #define fprintf(x, y, ...) printf(y, ## __VA_ARGS__)