C library function - rewind()

Description

The C library function void rewind(FILE *stream) sets the file position to the beginning of the file of the given stream.

Declaration

Following is the declaration for rewind() function.

void rewind(FILE *stream)

Parameters

• stream -- This is the pointer to a FILE object that identifies the stream.

Return Value

This function does not return any value.

Example

The following example shows the usage of rewind() function.

#include <stdio.h>

int main()
{
   FILE *fp;
   int ch;

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

   if( fp != NULL ) 
   {
      while( !feof(fp) )
      {
         ch = fgetc(fp);
         printf("%c", ch);
      }
      rewind(fp);

      while( !feof(fp) )
      {
         ch = fgetc(fp);
         printf("%c", ch);
      }
      fclose(fp);
   }

   return(0);
}

Assuming we have a text file file.txt having the following content:

This is tutorialspoint.com

Now let us compile and run the above program, this will produce the following result:

This is tutorialspoint.com
This is tutorialspoint.com