No return on char counting program
When I execute the following piece of code I'm prompted to typed in some characters, however nothing happens when I press return. Surely a value should be returned indicating how many characters are contained in the input?
Code:#include <stdio.h> main() { long nc; nc = 0; while(getchar() != EOF) ++nc; printf("%ld\n", nc); }
Ugh, formatting...
Thats a little better and isn't the code clearer now too?Code:#include <stdio.h> main() { long nc; nc = 0; while(getchar() != EOF) ++nc; printf("%ld\n", nc); }
As for your question here is a hint: EOF != '\n' (or maybe '\r' depending on platform)
Because pressing return does not indicate EOF.
Try using:
instead.Code:while(getchar() != '\n')
C programming resources:
GNU C Function and Macro Index -- glibc reference manual
The C Book -- nice online learner guide
Current ISO draft standard
CCAN -- new CPAN like open source library repository
3 (different) GNU debugger tutorials: #1 -- #2 -- #3
cpwiki -- our wiki on sourceforge
Thanks all. One more thing..... when the program is running, how do I escape back to normal terminal node?
Well, once you escape your while() loop with either CTRL-D (EOF) or ENTER ('\n') it should print the number of characters and exit for you...
