Counting Tabs, New lines, etc. ~error~

[Matt]

Ok, sorry for posting so much, but I just have alot of questions. Ok,
so It says to make a program to count blanks, tabs, and newlines.

So I made one:

#include <stdio.h>

/* Count tabs, newlines and blanks; version 1 */
int main(void)
{
int c, nl, tb, cb;

nl = 0;
tb = 0;
cb = 0;
while ((c = getchar()) != EOF)
if (c == '\n')
++nl;
if (c == '\t')
++tb;
if (c == '_')
++cb;
printf("%d\n%d\n%d\n", nl, tb, cb);
return 0;
}

Now here's what I don't understand:

if (c == '\t')
++tb;

That(\t) be a tab so when I put a tab in it should make the count 1,
but it doesn't.

And:

if (c == '_')
++cb;

Should add a number to the blank count when you make a space, but it
doesn't. Also I wasn't sure about what the '?' was for a blank
space(eh, what a noob your thinking). Yes, I know: I'm a noob.

Ok well, could someone help me? Again: sorry for posting and asking so
much.

[Jason]

Matt wrote:
[ snip! ]

/* Count tabs, newlines and blanks; version 1 */
int main(void)
{
int c, nl, tb, cb;

nl = 0;
tb = 0;
cb = 0;
while ((c = getchar()) != EOF)
if (c == '\n')
++nl;
if (c == '\t')
++tb;
if (c == '_')
++cb;
printf("%d\n%d\n%d\n", nl, tb, cb);
return 0;
}

Hint: What is the significant difference between
the following bits of code?

/* SAMPLE #1 */
while ((c = getchar()) != EOF) {
/* some stuff */
/* some more stuff */
}
/* SAMPLE #2 */
while ((c = getchar()) != EOF)
/* some stuff */
/* some more stuff */

[Matt]

Wow, that's almost funny the mistake I made. Thanks alot for helping!

[Keith Thompson]

"Matt" <no******@gmail.com> writes:
[...]

And:

if (c == '_')
++cb;

Should add a number to the blank count when you make a space, but it
doesn't. Also I wasn't sure about what the '?' was for a blank
space

[...]

No, that increments the blank count when it sees an underscore
character.

The right way to do this is (you're going to slap yourself in the
forehead when you see this):

if (c == ' ')
++cb;

--
Keith Thompson (The_Other_Keith) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.

[Old Wolf]

Matt wrote:

Ok, sorry for posting so much, but I just have alot of questions. Ok,
so It says to make a program to count blanks, tabs, and newlines.

if (c == '_')
++cb;

Should add a number to the blank count when you make a space, but it
doesn't. Also I wasn't sure about what the '?' was for a blank
space(eh, what a noob your thinking). Yes, I know: I'm a noob.

'_' is not a space. It's a different character. You can use
it in variable names, eg:

char this_is_a_char;

If you want to check for a space, use (naturally):

if (c == ' ')