• fopen, fclose

#include 
     
      FILE *fopen(const char *path, const char *mode); int fclose(FILE *fp);
     

• fread, fwrite

#include 
     
      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);
     

• fgetc, getc, getchar: 读取一个字节返回一个字符

#include 
     
      int fgetc(FILE *stream);int getc(FILE *stream);int getchar(void);
     

• fputc, putc, putchar: 输出一个字符

#include 
     
      int fputc(int c, FILE *stream);int putc(int c, FILE *stream);int putchar(int c);
     

• 示例

#include 
     
      #include 
      
       int main(){    int c;    FILE *in, *out;    in = fopen("file.in","r");    out = fopen("file.out","w");    while((c = fgetc(in)) != EOF)        fputc(c,out);    exit(0);}