HELP!! Two questions from <<the c programming language>>

[Tak]

Exercise 1-9. Write a program to copy its input to its output,
replacing each string of one or
more blanks by a single blank.

Exercise 1-10. Write a program to copy its input to its output,
replacing each tab by \t, each
backspace by \b, and each backslash by \\. This makes tabs and
backspaces visible in an
unambiguous way.

Who could sent me the codes, Thanks very much! My email:
ka******@gmail. com

[Ian Collins]

Tak wrote:

Exercise 1-9. Write a program to copy its input to its output,
replacing each string of one or
more blanks by a single blank.

Exercise 1-10. Write a program to copy its input to its output,
replacing each tab by \t, each
backspace by \b, and each backslash by \\. This makes tabs and
backspaces visible in an
unambiguous way.

Who could sent me the codes, Thanks very much! My email:
ka******@gmail. com

No, that's not how it works here. You post your attempt, we help you
with problems. We don't do homework.

--
Ian Collins.

[Chris Dollin]

Tak wrote:

Exercise 1-9. Write a program to copy its input to its output,
replacing each string of one or
more blanks by a single blank.

Exercise 1-10. Write a program to copy its input to its output,
replacing each tab by \t, each
backspace by \b, and each backslash by \\. This makes tabs and
backspaces visible in an
unambiguous way.

Who could sent me the codes, Thanks very much! My email:
ka******@gmail. com

The /point/ about doing the exercises is to /learn by doing/. If
you don't do the work, the learning doesn't happen, or doesn't
happen as well.

Do the work. We can crit the result, but you have to show willing.

--
JUC 2007, submit: http://hpl.hp.com/conferences/juc2007/submission.html

Hewlett-Packard Limited Cain Road, Bracknell, registered no:
registered office: Berks RG12 1HN 690597 England

[Tak]

No, that's not how it works here. You post your attempt, we help you

with problems. We don't do homework.

--
Ian Collins.

No, I think you are misunderstandin g.
It's not homework;

I can't work out Exercise 1-9.
My code of Exercise 1-10 is like this:

#include <stdio.h>

main()
{
char c;

while ((c = getchar()) != EOF)
{
if (c == '\t')
printf("\\t");
else if (c == '\b')
printf("\\b");
else if (c == '\\')
printf("\\\\");
else
putchar(c);
}
}
I don't know whether it's right or not?

[Ian Collins]

Tak wrote:

>No, that's not how it works here. You post your attempt, we help you
with problems. We don't do homework.

--
Ian Collins.

No, I think you are misunderstandin g.
It's not homework;

I can't work out Exercise 1-9.

You have the basic structure, so you should be able to change your loop
to spot and filter spaces.

My code of Exercise 1-10 is like this:

#include <stdio.h>

main()

main returns int, if you compiler didn't warn you, turn up the warnings
until it does.

{
char c;

while ((c = getchar()) != EOF)
{
if (c == '\t')
printf("\\t");
else if (c == '\b')
printf("\\b");
else if (c == '\\')
printf("\\\\");
else
putchar(c);
}
}
I don't know whether it's right or not?

It looks OK, but have you tried it? It should be easy enough to test.

--
Ian Collins.

[Tak]

I know how to do, Thank you!

[Ian Collins]

Tak wrote:

I know how to do, Thank you!

Good. Next time, please keep some context from the message you are
replying to.

--
Ian Collins.

[Keith Thompson]

Ian Collins <ia******@hotma il.comwrites:

Tak wrote:

[...]

>{
char c;

while ((c = getchar()) != EOF)

[snip]

>I don't know whether it's right or not?

It looks OK, but have you tried it? It should be easy enough to test.

What type does getchar() return?

See also section 12 of the comp.lang.c FAQ, <http://www.c-faq.com/>.

--
Keith Thompson (The_Other_Keit h) 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."
-- Antony Jay and Jonathan Lynn, "Yes Minister"

[Guru Jois]

On May 31, 1:55 pm, Tak <kakat...@gmail .comwrote:

No, that's not how it works here. You post your attempt, we help you
with problems. We don't do homework.

--
Ian Collins.

No, I think you are misunderstandin g.
It's not homework;

I can't work out Exercise 1-9.
My code of Exercise 1-10 is like this:

#include <stdio.h>

main()
{
char c;

while ((c = getchar()) != EOF)
{
if (c == '\t')
printf("\\t");
else if (c == '\b')
printf("\\b");
else if (c == '\\')
printf("\\\\");
else
putchar(c);
}

}

I don't know whether it's right or not?

everything is ok...why don't you run this and see?

why you can't work out 1-9 ?? I can give you idea, you implement it.

accept the char.. if it is a space set a flag saying you got one
space. you should ignore further spaces if this flag is set, otherwise
display further chars.
Continue this till eof.

Huuuh...didn't get idea???? Follow the step

Algorithm trim_space

while EOF
do
begin
input char
if char = space then
begin
if flag = 0 then
begin
let flag = 1;
print char;
end
end
else
begin
let flag = 0
print char
end
end
goto step 2
end while

Bye
Guru Jois

[Chris Dollin]

Tak wrote:

>No, that's not how it works here. You post your attempt, we help you
with problems. We don't do homework.

(fx:hint (fx:snipped-signature))

No, I think you are misunderstandin g.
It's not homework;

I can't work out Exercise 1-9.
My code of Exercise 1-10 is like this:

#include <stdio.h>

main()
{
char c;

/int/ c.

while ((c = getchar()) != EOF)

`getchar` returns an `int`, because it must be able to return
every character value /and one more/, viz EOF. (Yes, this
presents problems on systems where `sizeof(int) == sizeof(char)`.)

I don't know whether it's right or not?

Does it pass your test cases?

--
"You've spotted a flaw in my thinking, Trev" Big Al,/The Beiderbeck Connection/

Hewlett-Packard Limited registered office: Cain Road, Bracknell,
registered no: 690597 England Berks RG12 1HN