There's a simple trick to printing on the same line: Don't print newlines, print carriage returns instead. That will return it to the beginning of the line, instead of moving to the next line, without resorting to things like ANSI escape sequences.
Of course you have to be careful to always overwrite everything that was printed last time, otherwise you'd get a countdown like 10,90,80,70,60,50,40,30,20,10 -- not what you wanted at all
And since you're not printing a newline, you either need to flush the output all the time, or print to the unbuffered-by-default stderr (or cerr) stream.
Code:
int n;
for(n=10; n>0; n--)
{
// %2d pads with spaces to two characters
fprintf(stderr, "\r%2d", n);
sleep(1);
}
---------- Post updated at 09:38 AM ---------- Previous update was at 09:29 AM ----------
Quote:
Originally Posted by bashuser2
Just a question in that though: Is there any C++(or even C) way of not calling this function all the time? (as the game will have many dialogues)Is there any way to tell the program that for everything printed in the program,you will use this function? A little bit difficult I think...
You could try overloading some functions in ostream for that, I suppose. I'm not sure you're given enough access to its internals to really affect the way the buffer is flushed, though. Theoretically these things are flexible like that. In practice...they're not.
I don't see what's so bad about calling a function. Are you really going to want to print everything like that, all the time? Or just dialogues? If you're thinking you want to avoid a million function calls like
print_dialogue("line1");
print_dialogue("line2");
print_dialogue("line3");
...
then it's time to abstract that some more, looping it somehow, or having the loop happen inside print_dialogue itself. An array of strings would work, and could be replaced by another backend like reading it from a file later.
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LEARN ABOUT SUSE
droplang
DROPLANG(1) PostgreSQL Client Applications DROPLANG(1)NAME
droplang - remove a PostgreSQL procedural language
SYNOPSIS
droplang [ connection-option... ] langname [ dbname ]
droplang [ connection-option... ] [ --list ] [ -l ] dbname
DESCRIPTION
droplang is a utility for removing an existing programming language from a PostgreSQL database. droplang can drop any procedural language,
even those not supplied by the PostgreSQL distribution.
Although backend programming languages can be removed directly using several SQL commands, it is recommended to use droplang because it
performs a number of checks and is much easier to use. See DROP LANGUAGE [drop_language(7)] for more.
OPTIONS
droplang accepts the following command line arguments:
langname
Specifies the name of the backend programming language to be removed.
[-d] dbname
[--dbname] dbname
Specifies from which database the language should be removed. The default is to use the database with the same name as the current
system user.
-e
--echo Display SQL commands as they are executed.
-l
--list Show a list of already installed languages in the target database.
droplang also accepts the following command line arguments for connection parameters:
-h host
--host host
Specifies the host name of the machine on which the server is running. If host begins with a slash, it is used as the directory for
the Unix domain socket.
-p port
--port port
Specifies the Internet TCP/IP port or local Unix domain socket file extension on which the server is listening for connections.
-U username
--username username
User name to connect as.
-w
--no-password
Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as
a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to
enter a password.
-W
--password
Force droplang to prompt for a password before connecting to a database.
This option is never essential, since droplang will automatically prompt for a password if the server demands password authentica-
tion. However, droplang will waste a connection attempt finding out that the server wants a password. In some cases it is worth
typing -W to avoid the extra connection attempt.
ENVIRONMENT
PGDATABASE
PGHOST
PGPORT
PGUSER Default connection parameters
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see in the documentation).
DIAGNOSTICS
Most error messages are self-explanatory. If not, run droplang with the --echo option and see under the respective SQL command for details.
Also, any default connection settings and environment variables used by the libpq front-end library will apply.
NOTES
Use createlang(1) to add a language.
EXAMPLES
To remove the language pltcl:
$ droplang pltcl dbname
SEE ALSO createlang(1), DROP LANGUAGE [drop_language(7)]
Application 2010-05-14 DROPLANG(1)
11-25-2010
