#ifndef _STDIO_H#define _STDIO_H#include "types.h"#ifndef _VALIST#define _VALISTtypedef char *va_list;#endif /* _VALIST */extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);extern int snprintf(char * buf, size_t size, const char *fmt, ...);extern int vsprintf(char *buf, const char *fmt, va_list args);extern int sprintf(char * buf, const char *fmt, ...);extern int vsscanf(const char * buf, const char * fmt, va_list args);extern int sscanf(const char * buf, const char * fmt, ...);extern void putc(unsigned char c);extern unsigned char getc(void);int printf(const char *fmt, ...);int scanf(const char * fmt, ...);#endif /* _STDIO_H */