谁来介绍点对文件进行操作的C库涵数？

这是从TC中的头文件stdio.h中找来的，你参考一下吧~~
void _Cdecl clearerr (FILE *stream);
int _Cdecl fclose (FILE *stream);
int _Cdecl fflush (FILE *stream);
int _Cdecl fgetc (FILE *stream);
int _Cdecl fgetpos (FILE *stream, fpos_t *pos);
char *_Cdecl fgets (char *s, int n, FILE *stream);
FILE *_Cdecl fopen (const char *path, const char *mode);
int _Cdecl fprintf (FILE *stream, const char *format, ...);
int _Cdecl fputc (int c, FILE *stream);
int _Cdecl fputs (const char *s, FILE *stream);
size_t _Cdecl fread (void *ptr, size_t size, size_t n, FILE *stream);
FILE *_Cdecl freopen (const char *path, const char *mode,
FILE *stream);
int _Cdecl fscanf (FILE *stream, const char *format, ...);
int _Cdecl fseek (FILE *stream, long offset, int whence);
int _Cdecl fsetpos (FILE *stream, const fpos_t *pos);
long _Cdecl ftell (FILE *stream);
size_t _Cdecl fwrite (const void *ptr, size_t size, size_t n,