The rewind () function in C

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

Declaring rewind () function in C

Below is the declaration for rewind () function in C:

 void  rewind ( FILE  * stream ) 

Parameters

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

Returns the value

This function does not return any values.

For example

The following C program illustrates the use of rewind () function in C:

 #include int  main () { char  str [] = "Hoc C co ban va nang cao tai QTM !!!" ;  FILE  * fp ; int  ch ; /* Dau tien chung ta ghi mot so noi dung vao baitapc.txt */  fp  =  fopen ( "baitapc.txt" , "w" );  fwrite ( str  , 1 , sizeof ( str ) ,  fp  );  fclose ( fp );  fp  =  fopen ( "baitapc.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 ); } 

Compile and run the above C program to see the results:

According to Tutorialspoint

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