My program only ouputs the correct magic square sum totals for the number 15.If I enter any odd number smaller than 15 my sum totals are incorrect. I have define "size" to 15. How or what do I change so that my program will output the magic square results for the odd numbers 1 through 15 without having to change the value in my "#define size 15"?Or do I need to get rid of this define statement? How do I define my array size to be the max 15 by 15. Then, input the size of the array that I want to build?
Hi,
Program A: uses pipe()
I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:
* child
-> dup2(fd, STDOUT_FILENO);
-> execl("/path/PROGRAM B", "PROGRAM B", NULL);
* parent
-> char line;
-> read(fd, line, 100);
Question:
---------... (1 Reply)
Hi,
Program A: uses pipe()
I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:
* child
-> dup2(fd, STDOUT_FILENO);
-> execl("/path/PROGRAM B", "PROGRAM B", NULL);
* parent
-> char line;
-> read(fd, line, 100);
Question:
---------... (3 Replies)
Hi,
I wanted to know if i can write a program using switches and signals, etc to trace execution of other unix program which calls c program internally.
If yes how? If not with signals and switches then are there any other methods apart from debugging with gdb/dbx. (3 Replies)
Hi,
i want to write a script that executes a program (exec?) .
this program then requires a filename as input.
how do i give it this input in the script so the program will be complete run and close by the script.
e.g.
exec prog.exe
program then asks for filename
"enter filename:"... (1 Reply)
Hi guys
I so upset today
i have this question about socket and i made the program do you know what wrong with it
this the question :
Write one TCP socket program (named webclient.cpp) to simulate a web browser by using HTTP/1.1.
The client should take three... (1 Reply)
I wrote a simple program that generates a random word 10,000,000 times.
I wrote it in python, then in C++ and compared the two completion times. The python script was faster! Is that normal? Why would the python script be faster? I was under the impression that C++ was faster. What are some of... (2 Replies)
Hi All,
Probably this is a repeated question. My knowledge in this is limited and i got confused on all those materials i got in google search.
We use #include <> to include a predefined library like stdio.h
i saw somewhere that #include "" includes a man made module(another C program). IS... (2 Replies)
Long story short: I'm working inside of a Unix SSH under a bash shell. I have to code a C program that generates a random number. Then I have to call the compiled C program with a Perl program to run the C program 20 times and put all the generated random #s into a text file, then print that text... (1 Reply)
I created a program, so a kid can practice there math on it. It dispenses varies math problems and the kid must input an answer. I also want it to grade the work they have done, but I can't find the best place for it to print out the grade.
I have:
if ( $response =~ m/^/ ) {
$user_wants_to_quit... (1 Reply)
Discussion started by: germany1517
1 Replies
LEARN ABOUT DEBIAN
ac
AC(1) General Commands Manual AC(1)NAME
ac - print statistics about users' connect time
SYNOPSIS
ac [ -d | --daily-totals ] [ -y | --print-year ]
[ -p | --individual-totals ] [ people ]
[ -f | --file filename ] [ -a | --all-days ]
[ --complain ] [ --reboots ] [ --supplants ]
[ --timewarps ] [ --compatibility ]
[ --tw-leniency num ] [ --tw-suspicious num ]
[ -z | --print-zeros ] [ --debug ]
[ -V | --version ] [ -h | --help ]
DESCRIPTION
ac prints out a report of connect time (in hours) based on the logins/logouts in the current wtmp file. A total is also printed out.
The accounting file wtmp is maintained by init(8) and login(1). Neither ac nor login creates the wtmp if it doesn't exist, no accounting
is done. To begin accounting, create the file with a length of zero.
NOTE: The wtmp file can get really big, really fast. You might want to trim it every once and a while.
GNU ac works nearly the same u*x ac, though it's a little smarter in several ways. You should therefore expect differences in the output
of GNU ac and the output of ac's on other systems. Use the command info accounting to get additional information.
OPTIONS -d, --daily-totals
Print totals for each day rather than just one big total at the end. The output looks like this:
Jul 3 total 1.17
Jul 4 total 2.10
Jul 5 total 8.23
Jul 6 total 2.10
Jul 7 total 0.30
-p, --individual-totals
Print time totals for each user in addition to the usual everything-lumped-into-one value. It looks like:
bob 8.06
goff 0.60
maley 7.37
root 0.12
total 16.15
people Print out the sum total of the connect time used by all of the users included in people. Note that people is a space separated list
of valid user names; wildcards are not allowed.
-f, --file filename
Read from the file filename instead of the system's wtmp file.
--complain
When the wtmp file has a problem (a time-warp, missing record, or whatever), print out an appropriate error.
--reboots
Reboot records are NOT written at the time of a reboot, but when the system restarts; therefore, it is impossible to know exactly
when the reboot occurred. Users may have been logged into the system at the time of the reboot, and many ac's automatically count
the time between the login and the reboot record against the user (even though all of that time shouldn't be, perhaps, if the system
is down for a long time, for instance). If you want to count this time, include the flag. *For vanilla ac compatibility, include
this flag.*
--supplants
Sometimes, a logout record is not written for a specific terminal, so the time that the last user accrued cannot be calculated. If
you want to include the time from the user's login to the next login on the terminal (though probably incorrect), include this you
want to include the time from the user's login to the next login on the terminal (though probably incorrect), include this flag.
*For vanilla ac compatibility, include this flag.*
--timewarps
Sometimes, entries in a wtmp file will suddenly jump back into the past without a clock change record occurring. It is impossible
to know how long a user was logged in when this occurs. If you want to count the time between the login and the time warp against
the user, include this flag. *For vanilla ac compatibility, include this flag.*
--compatibility
This is shorthand for typing out the three above options.
-a, --all-days
If we're printing daily totals, print a record for every day instead of skipping intervening days where there is no login activity.
Without this flag, time accrued during those intervening days gets listed under the next day where there is login activity.
--tw-leniency num
Set the time warp leniency to num seconds. Records in wtmp files might be slightly out of order (most notably when two logins occur
within a one-second period - the second one gets written first). By default, this value is set to 60. If the program notices this
problem, time is not assigned to users unless the --timewarps flag is used.
--tw-suspicious num
Set the time warp suspicious value to num seconds. If two records in the wtmp file are farther than this number of seconds apart,
there is a problem with the wtmp file (or your machine hasn't been used in a year). If the program notices this problem, time is
not assigned to users unless the --timewarps flag is used.
-y, --print-year
Print year when displaying dates.
-z, --print-zeros
If a total for any category (save the grand total) is zero, print it. The default is to suppress printing.
--debug
Print verbose internal information.
-V, --version
Print the version number of ac to standard output and quit.
-h, --help
Prints the usage string and default locations of system files to standard output and exits.
FILES
wtmp
The system wide login record file. See wtmp(5) for further details.
AUTHOR
The GNU accounting utilities were written by Noel Cragg <noel@gnu.ai.mit.edu>. The man page was adapted from the accounting texinfo page by
Susan Kleinmann <sgk@sgk.tiac.net>.
SEE ALSO login(1), wtmp(5), init(8), sa(8)
2010 August 16 AC(1)