10 int printf(char *fmt
, ...);
11 int fprintf(FILE *filp
, char *fmt
, ...);
12 int sprintf(char *dst
, char *fmt
, ...);
13 int vsprintf(char *dst
, char *fmt
, va_list ap
);
15 FILE *fopen(char *path
, char *mode
);
17 void setbuf(FILE *fp
, char *buf
);