text: #ifndef _STDIO_H
  #define _STDIO_H 1
   
  #include <sys/cdefs.h>
   
  #define EOF (-1)
   
  #ifdef __cplusplus
  extern "C" {
  #endif
   
  int printf(const char* __restrict, ...);
  int putchar(int);
  int puts(const char*);
  int gets(char *);
  int scanf(const char *, ...);
   
  #ifdef __cplusplus
  }
  #endif
   
  #endif
  