Why does the following code report the number of characters to be 6 even if we enter only 2...
Code:#include<stdio.h> #include<string.h> int main() { FILE *fp; char c; fp=fopen("random","w"); while((c=getchar())!=EOF) putc(c,fp); printf("\nNo. of characters = %ld",ftell(fp)); fclose(fp); }
No idea - it works here.
The three characters being "Hi" and a newline.Code:$ cat bar.c #include<stdio.h> #include<string.h> int main() { FILE *fp; char c; fp=fopen("random","w"); while((c=getchar())!=EOF) putc(c,fp); printf("\nNo. of characters = %ld",ftell(fp)); fclose(fp); } $ gcc bar.c $ ./a.out Hi No. of characters = 3$
Perhaps open your "random" file in a hex editor and see what extra bytes you have.
(or even your text editor, if it doesn't barf on non-text files).
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
created a file with two characters 'a' and 'b'.Originally Posted by Salem
Only two characters ('a' and 'b') appear in notepad, but 6 characters with hexadecimal values 61 0D 0A 62 0D 0A appear in hex editor.
0D and 0A automatically get appended to any character I write.
Well that's OK then - you're using DOS/Windows, and each line ends with both a newline and a carriage return.
If you enter "ab" then press return, then ctrl-z, you should see 4 chars.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Keep practising, and using your hex editor - it'll come to you eventually.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
..... and I was excited that I have another virus peacefully reciding in my PC. Thanks!
0xOD = carriage return
0x0A = line feed
The result of pressing <Enter> after each letter... windows writes cr/lf pairs ...
Last edited by CommonTater; 12-18-2011 at 03:33 AM.
