Is there any command like Pause or Nope in C++?

[Jackie]

I just want the programme to stop for a while.
Thanks.

[osmium]

"Jackie" writes:

I just want the programme to stop for a while.

Your best bet is probably the system() function since
it lets you interact with the OS. For example, in Windows, try
system("pause") ;

[Alvin]

Jackie wrote:

I just want the programme to stop for a while.
Thanks.

Do you want the program to stop until you hit enter? If so, use cin like:

string str;
cin >> str;

That will stop the program till you press the Enter key.

Alvin

[Tom]

On Sun, 29 Jan 2006 08:43:57 -0800, "osmium" <r1********@com cast.net>
wrote:

"Jackie" writes:

I just want the programme to stop for a while.

Your best bet is probably the system() function since
it lets you interact with the OS. For example, in Windows, try
system("pause" );

In C type logic ... I create a dummy string and use gets() to pause a
program.

#include <stdio.h>

char junk[81];
printf("routine _name(%d):"
" hit return to continue the paused program ...\n", __LINE__);
gets(junk);

-----------------

gets(junk); is good for clearing erroneous key strokes before
prompting for keyboard input in programs as well.

If erroneous keystrokes occur and the pause is critical ... you should
test for a null string. The following echos the erroneous keystrokes:

if(junk[0])
{
printf("routine _name(%d): junk = %s\n", __LINE__, junk);
gets(junk);
}

The "__LINE__" macro tells you the exact line and by including the
name of the routine in your printf statement you can find this pause
point easily.

Setting a break point would work too. But I usually don't debug using
break points. I like print statements. I often write them to log files
and turn the pause feature on and off with a #define.

#define pause 1
if(pause) gets(junk);

My apologies for not having sufficient C++ skills to make the code
clean and gorgeous. Fortunately C is fully supported in C++. My bet is
a C++ guru in here will teach us both a better way. :))

[Victor Bazarov]

Tom wrote:

On Sun, 29 Jan 2006 08:43:57 -0800, "osmium" <r1********@com cast.net>
wrote:

"Jackie" writes:

I just want the programme to stop for a while.
Your best bet is probably the system() function since
it lets you interact with the OS. For example, in Windows, try
system("pause") ;

In C type logic ... I create a dummy string and use gets() to pause a
program.

#include <stdio.h>

char junk[81];
printf("routine _name(%d):"
" hit return to continue the paused program ...\n", __LINE__);
gets(junk);

That is a *HUGE* security risk. What if I type more than 80 characters?
I suddely make your program _read my input_ into the memory that wasn't
designated for it.
-----------------

gets(junk); is good [..]

No! It's _awful_. Never use it. NEVER!

V

[Jacek Dziedzic]

Alvin wrote:

Jackie wrote:

I just want the programme to stop for a while.
Thanks.

Do you want the program to stop until you hit enter? If so, use cin like:

string str;
cin >> str;

That will stop the program till you press the Enter key.

No, not really. Try it yourself. It will stop the program
till you press _something_ and then the Enter key.

- J.

[Tom]

On Sun, 29 Jan 2006 14:39:45 -0500, "Victor Bazarov"
<v.********@com Acast.net> wrote:

Tom wrote:

On Sun, 29 Jan 2006 08:43:57 -0800, "osmium" <r1********@com cast.net>
wrote:

"Jackie" writes:

I just want the programme to stop for a while.

Your best bet is probably the system() function since
it lets you interact with the OS. For example, in Windows, try
system("pause") ;

In C type logic ... I create a dummy string and use gets() to pause a
program.

#include <stdio.h>

char junk[81];
printf("routine _name(%d):"
" hit return to continue the paused program ...\n", __LINE__);
gets(junk);

That is a *HUGE* security risk. What if I type more than 80 characters?
I suddely make your program _read my input_ into the memory that wasn't
designated for it.

-----------------

gets(junk); is good [..]

No! It's _awful_. Never use it. NEVER!

V

Victor --

I believe you missed the "erroneous" part of the discussion?
The method I proposed is one I have used for years and was learned
from a C textbook. Typically I set the size of junk[] to 240
characters and use it for all types of input and output. But how do
you justify that size without other usages?

Check out the Microsoft help on gets(). You will see they use a size
of 81 for that example.

If you "get" 80 characters from a erroneous pool of xxxx characters
.... what remains is (xxxx - 80) erroneous characters. I suppose those
erroneous characters are a *HUGE* security risk and they are _awful_
too. Perhaps we should destroy all computers ... the risk is just
great for mankind.

I took the effort to read several of your replies. Your knowledge of
C++ is light years beyond mine as easily observed; however, you seem
to have made yourself a self appointed cop in the group?

And your preferred solution to the original question is .... ???

Please impress me with "how" to do things better and quit slamming
folks for existing outside your definition of intelligence. Go ahead,
teach me! I can learn from you. And just maybe ... you can learn a
thing or two as well?

-- Tom

[Dakka]

Tom wrote:

On Sun, 29 Jan 2006 14:39:45 -0500, "Victor Bazarov"
<v.********@com Acast.net> wrote:

Tom wrote:

On Sun, 29 Jan 2006 08:43:57 -0800, "osmium" <r1********@com cast.net>
wrote:

"Jackie" writes:

> I just want the programme to stop for a while.
Your best bet is probably the system() function since
it lets you interact with the OS. For example, in Windows, try
system("pause") ;

In C type logic ... I create a dummy string and use gets() to pause a
program.

#include <stdio.h>

char junk[81];
printf("routine _name(%d):"
" hit return to continue the paused program ...\n", __LINE__);
gets(junk);

That is a *HUGE* security risk. What if I type more than 80 characters?
I suddely make your program _read my input_ into the memory that wasn't
designated for it.

-----------------

gets(junk); is good [..]

No! It's _awful_. Never use it. NEVER!

V

Victor --

I believe you missed the "erroneous" part of the discussion?
The method I proposed is one I have used for years and was learned
from a C textbook. Typically I set the size of junk[] to 240
characters and use it for all types of input and output. But how do
you justify that size without other usages?

Check out the Microsoft help on gets(). You will see they use a size
of 81 for that example.

If you "get" 80 characters from a erroneous pool of xxxx characters
... what remains is (xxxx - 80) erroneous characters. I suppose those
erroneous characters are a *HUGE* security risk and they are _awful_
too. Perhaps we should destroy all computers ... the risk is just
great for mankind.

I took the effort to read several of your replies. Your knowledge of
C++ is light years beyond mine as easily observed; however, you seem
to have made yourself a self appointed cop in the group?

And your preferred solution to the original question is .... ???

Please impress me with "how" to do things better and quit slamming
folks for existing outside your definition of intelligence. Go ahead,
teach me! I can learn from you. And just maybe ... you can learn a
thing or two as well?

-- Tom

For what its worth, I second this.
V - take a few deep breaths before you fire off next time. Proficiency
in C++ does not entitle you to bad manners.
--dakka

[Luke Meyers]

Tom wrote:

On Sun, 29 Jan 2006 14:39:45 -0500, "Victor Bazarov"
<v.********@com Acast.net> wrote:

Tom wrote:

char junk[81];
printf("routine _name(%d):"
" hit return to continue the paused program ...\n", __LINE__);
gets(junk);
That is a *HUGE* security risk. What if I type more than 80 characters?
I suddely make your program _read my input_ into the memory that wasn't
designated for it.

I believe you missed the "erroneous" part of the discussion?

No, you just missed the point. He's right, it's an enormous security
risk and it's awful. You need to spend less time being defensive and
more time worrying about writing correct code.
The method I proposed is one I have used for years and was learned
from a C textbook.
Marvelous. It's wrong.
If you "get" 80 characters from a erroneous pool of xxxx characters
... what remains is (xxxx - 80) erroneous characters. I suppose those
erroneous characters are a *HUGE* security risk and they are _awful_
too. Perhaps we should destroy all computers ... the risk is just
great for mankind.
Uh, are you seriously not familiar with the concept of a buffer
overflow? You allocate an array of 80 characters, then pass that array
(as a pointer) to a function which will read in as many characters as
the user cares to type. The 81st character clobbers some random chunk
of memory, and you get undefined behavior; in many cases, this is an
easy security exploit.
I took the effort to read several of your replies. Your knowledge of
C++ is light years beyond mine as easily observed; however, you seem
to have made yourself a self appointed cop in the group?
Warning people not to heed dangerous and incorrect advice is a good
thing. Why is this personal for you?
Please impress me with "how" to do things better and quit slamming
folks for existing outside your definition of intelligence.
Nobody slammed you. The dangerous and ill-founded recommendation you
voiced received a well-deserved thrashing, but that, again, is a good
thing.
Go ahead,
teach me! I can learn from you. And just maybe ... you can learn a
thing or two as well?

Enough melodrama. This is a technical newsgroup, please make sound
technical arguments. Nobody's convinced of anything by hissy fits.

Luke

[Jim Langston]

"Jacek Dziedzic" <jacek@no_spam. tygrys.no_spam. net> wrote in message
news:56******** *************** ****@news.chell o.pl...

Alvin wrote:

Jackie wrote:

I just want the programme to stop for a while.
Thanks.

Do you want the program to stop until you hit enter? If so, use cin like:

string str;
cin >> str;

That will stop the program till you press the Enter key.

No, not really. Try it yourself. It will stop the program
till you press _something_ and then the Enter key.

- J.

This is what I also use, std::cin >> str;
but if you are not worried about platform compatability you could use
whatever your compiler allows to see if a key has been pressed. I know that
microsoft compilers generally have a kbhit used like:
while ( !kbhit() );

I've always wished this to be part of the standard cause it's just so
useful.