stdio.h

   1 #include <stdarg.h>
   2
   3 typedef struct {
   4         int fd;
   5 } FILE;
   6
   7 extern FILE *stdout;
   8 extern FILE *stderr;
   9
  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);
  14
  15 void perror(char *s);