Header File 

stdio.h  

Category 

Input/output Routines 

Prototype 

void rewind(FILE *stream); 

Description 

Repositions a file pointer to the beginning of a stream. 

rewind(stream) is equivalent to fseek(stream, 0L, SEEK_SET), except that rewind clears the end-of-file and error indicators, while fseek clears the end-of-file indicator only. 

After rewind, the next operation on an update file can be either input or output. 

Return Value 

None. 

Example  

#include <stdio.h>
#include <dir.h>
int main(void)
{
    FILE *fp;
    char *fname = "TXXXXXX", *newname, first;
    newname = mktemp(fname);
    fp = fopen(newname,"w+");
    fprintf(fp,"abcdefghijklmnopqrstuvwxyz");
    rewind(fp);
    fscanf(fp,"%c",&first);
    printf("The first character is: %c\n",first);
    fclose(fp);
    remove(newname);
    return 0;
}

Portability