Ok, I am revisiting the whole getchar() and EOF thing here.
I am still working through K&R, as time permits (I work at a totally unrelated job, so sometimes I do not get a lot of time to learn C) and I got to exercise 1-8, where they want a program that counts blanks, tabs, and newlines. So anyway, I do not have the book with the answers to K&R. I do have some answers online, however they do not help me to understand the why of the whole thing, meaning that I don't really learn why I am doing stuff. It would be like me asking you guys to write the program for me. I think my problem lies with a poor understanding of getchar() and EOF. Of course some of you will likely tell me that my problems lie with a poor understanding of C... Anyway, if there are any of you who can help me with understanding what is going on with the question, and why my code does not do what I want it to, I would appreciate it a lot.
Here is what I did (I will list what it does when I run it following...)
Ok, so here is what happens when I run it:
/* Program to count blanks, tabs, and newlines (Exercise 1-8 in K&R) */
int c, nl, tab, blank;
nl = 0;
tab = 0;
blank = 0;
while ( ( c = getchar() ) != EOF )
if ( c == '\n' )
printf( "There were %d new lines\n", nl );
if ( c == '\t' )
printf( "There were %d tabs\n", tab );
if ( c == ' ' )
printf( "There were %d blanks\n", blank );
It seems to do the newlines thing right, but it better, as it is basically right out of the book. Anyway, enough out of me here, as I don't get it. Hopefully someone will help. Thanks.
[Tue Feb 4 ~/cprograms]$count_tabs
testing my program. a tab here, and some spaces here
and then a new line
and another tab and then another, and another,
There were 8 new lines
There were 0 tabs
There were 0 blanks