#include <stdio.h> FILE *fopen(const char *path, const char *mode); FILE *fdopen(int fd, const char *mode); int fclose(FILE *fp);
#include <stdio.h> int fprintf(FILE *stream, const char *format, ...); int fscanf(FILE *stream, const char *format, ...); char *fgets(char *s, int size, FILE *stream); size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream); size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
#include <stdio.h> int fseek(FILE *stream, long offset, int whence); long ftell(FILE *stream); void rewind(FILE *stream);