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In my following code I am demonstrating the fseek & the ftell functions.
Say I input ABCD and then the EOF !!
The output should be 4; instead it is showing 6.
Moreover the EOF is NOT being accepted in the same line(row) as ABCD, it is ONLY being accepted if I move to the next line(s).

For eg.
Say,
I input,
ABCDE
"EOF"
It should read the number of characters as 5. But it is reading it as 7.
5 + 1(for the next line) = 6
But the compiler is returning 7 as the result.

// Unable to Understand Why !!
// Also I would really appreciate if you could tell me why the EOF is not being accepted in the same line as the INPUT(in this case ABCDE).

******************************

C#
/* WAP that uses ftell & fseek */

#include<stdio.h>
#include<conio.h>

int main()
{
    FILE *fp;
    long n;
    char c;

    fp=fopen("RANDOM","w");

    while((c=getchar())!=EOF)
        putc(c,fp);

    printf("No of Characters Entered = %ld",ftell(fp));

    fclose(fp);

    fp=fopen("RANDOM","r");

    n=0L;

    while(feof(fp)==0)
    {
        fseek(fp,n,0);          /* Position to (n+1)th character */
        printf("\nPosition of %c is %ld",getc(fp),ftell(fp));
        n=n+5L;
    }

    putchar('\n');

    fseek(fp,-1L,2);            /* Position to the Last Character */

    do
    {
        putchar(getc(fp));
    }
    while(fseek(fp,-2L,1));

    fclose(fp);

return 0;
}
Posted

1 solution

If you press the ENTER key at the end of your string then the system will add \r\n (Carriage return and Line feed). And the EOF is always a separate line on input from the keyboard, as it is only recognised when entered on its own.
 
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