C库函数 - rewind()

#include <stdio.h>



int main () {

   char str[] = "This is codingdict.com";

   FILE *fp;

   int ch;



   /* First let's write some content in the file */

   fp = fopen( "file.txt" , "w" );

   fwrite(str , 1 , sizeof(str) , fp );

   fclose(fp);



   fp = fopen( "file.txt" , "r" );

   while(1) {

      ch = fgetc(fp);

      if( feof(fp) ) {

         break ;

      }

      printf("%c", ch);

   }

   rewind(fp);

   printf("\n");

   while(1) {

      ch = fgetc(fp);

      if( feof(fp) ) {

         break ;

      }

      printf("%c", ch);



   }

   fclose(fp);



   return(0);

}