I'm trying to write a program that generates a random number and then tells if it is prime or not. I have doe some research about how to calculate prime and random numbers but I'm still having trouble. I don't really get how to calculate a prime number. I know a prime number is a number that is divisible by 1 and and itself. how to calculate a prime number in C?
View 10 RepliesI am trying to generate sequence of number in the order of :
1
2
3
4
[Code]....
I have gotten over my inability to add SELinux users and am trying to write an SELinux module on my Fedora 10 machine, standard SELinux distribution. Most of it works just fine, but I've been having strange troubles with some policy interfaces--m4 expands them to numbers rather than valid SELinux policy language. Here's what I'm getting:
seutil_read_config($1_t) ---> 679
seutil_read_src_policy($1_t) ---> 1021
files_search_etc($1_t) ---> 1875
As far as I know all of these are valid policy interfaces (I've checked them up in their respective files, and they do exist and contain what appears to be valid policy). The last one I know because I went into seutil_read_src_policy and put its contents into the module rather than the macro itself. Now, I could do the same with files_search_etc, but really I'd like the top-level macro to just work. Does anyone know what is causing this problem? I'm certain I'm using correct syntax, unless there's a whitespace rule I'm not familiar with.
A secondary problem I have, generating warnings rather than errors, is that for some reason ' s are popping up in my expanded module, right after the end of expansions of some (but not all) macros that I've defined.
I'm trying to solve this problem, but always get Time limit exceeded. I've tried my best but still can't get under time limit. Could you please give me some hint about it?
Code:
#include <iostream>
#include <cmath>
[code]...
writing a program to find the prime numbers.i came to know that sieve of atkin is the most efficient algo to find the prime numbers.i am finding difficult to understand it
View 3 Replies View Relatedam writing a small search program for my class. I have decided to use indexing for my program. Ive researched online about indexing and how search engines do it. If im gonno do that I need to create inverted files to associate files to numbers ( numbers being the index of my paths ) . Now I was wondering what would be the best way to create an inverted file ? I was going to create sql tables using mysql api in C but then again there is no array data type or vectors to store few numbers in a single column in mysql and it is not advised to use Enum or SET
View 14 Replies View Relatedhow to generate excel charts from C, or if it's possible at all? For example, if I had 2 arrays that I wanted to export to excel and graph against each other. I know how to export it to a csv file, that's no problem, but I have no idea where to start with generating a graph of the data. I can't seem to find any examples anywhere. Just a simple example to show you what I mean: Code:
char arr1[] = {'a','b','c'};
int arr2[] = {10,20,30};
int main ()
[code]....
Unfortunatelly since i have no background at all about GUI programming, i dont know even the keyword for that i want to generate a pop up window from my program (written in C) which show a message and an OK button. in my opinion, maybe i should use directly the Xlib library and not the GTK or QT library for example so the program can work almost on every linux system. A code snippet/hint for the pop-up window then?
View 2 Replies View RelatedIm strugling with script that wil generate graph on demad. I put it in cgi-bin directory but cannot get it to work. i googled for perl generating images and tried few examples but none worked.
When I execute perl script in command line it throws picture i a bunch of characters so it creates it but wont show when I access it through a web page.
[Code]...
I'm trying to understand how interrupts work. Is there a way to generate timer interrupts in C. Also can we enter into the protected mode of the CPU. Does OS (specifically, linux) place any restrictions on user programs entering protected mode. If it does not, do we just have an assembly language program which changed the mode, followed by the C code... I'm just trying to understand how things work at the lowest level. So I'm trying to write few snippets to test my understanding.
View 3 Replies View RelatedI know how to manually writing a makefile for my project, but I am new in using makefile & configure file generation tools like automake to generate a makefile and a configure script file.
I had done research on tutorials for generating makefile and configure script file.
I know that I need to manually write two files (makefile.am and configure.in).
I use wxWidgets GUI library, libconfig library, and libpcap library to do my project.
wx-config is a tool that can return the library files and include directory for wxWidgets library.
When using g++ to compile my files, I need to add in this line "`/wxlib/bin/wx-config --version=2.9 --static=yes --unicode=yes --debug=yes --libs`"
How to add that line to the makefile.am file?
I want to write a function which calculates the space needed between fields, to generate a table with aligned fields, like when you type "ls -l", the operating system generates a table with beautifully aligned fields. I've got this code so far:
Code:
for line in $(cat tmpSearch)
do
line=`echo $line | tr ":" " "`
[code]....
I am running some muti-threaded code that uses a lot of memory (~6GB). I have it compiled on a cluster that uses Xeon 5160 quad core CPUs with 4MB cache/core, 8GB of RAM and kernel 2.6.18 (x86_64) and I have also the same code compiled on another cluster that uses Opteron 2214 quad core CPUs with 1MB cache/core, 8GB of RAM and kernel 2.6.28 (x86_64). On the Intel cluster the code generates barely any system load when I look on top but on the AMD cluster it can generate over 50% of system load. On the intel machines my process can generate a constant load of 3, while the load generated by the process on the AMD machines is about 1.6.
Does anybody know what could cause this? Could it be the version of the kernel or the difference between the CPUs (for example, the much smaller cache of the AMD CPUS)? My software and all its dependencies are the same on both clusters. I am also using the exact same version of GCC to compile everything.
I tried googling around but i cant find anything related to this: everyone seems just interested in random numbers, so when it comes to random letters there is a lack of informations. However, i am trying to figure out a wait to get a random letters string that matches a simple rule: it must be a sequence of consonant+vowel. So for example, these are some 6 letters strings i would like to obtain: wolupa, tafoke, zewevu, cupimo.
View 3 Replies View RelatedI am trying to write a loop to open four main-data-files. At each open of the main-data-file, I want the loop to open another four sub-files and split the data from the mail-data-file according to the creteria and dump into the four files. When the loop goes to the second main-data-file, it shall generate another 4 sub-files with different file name. And the process goes on. That means I will have total of 16 sub files for the four main-data-files. Each four files from the 16 files shall have specific name on it. Based on the code which I given below, I would say when the file at UNIT=100 is opened, 4 new files needed to be opened as well. They are:
maximum_dist_001_064.dat
maximum_dist_065_128.dat
maximum_dist_129_192.dat
maximum_dist_193_256.dat
Is it possible to generate keyboard event "Ctrl+c" from a shell script code.? I have written a shell script to compile my application and copy it to the server home directory, inorder to run my application I need to start the server (by running a shell script). But before that I need to stop the the currently running instance of my server. To do that I have to generate a keyboard event (Ctrl+c which I press it manually). I want to automate the entire process by writing a shell script I am able to run the server just by adding ./run.sh in my shell script. But before that to stop my server can I generate a keyboard by using a shell script event(ctrL+C) to stop server.?
View 2 Replies View RelatedGenerating avi files for movies directly from gfortran programs. I make movies from my Fortran codes using seismic unix - SU. Need to modernize this method to make avi movies or something similar. I am quite adept at generating "C" binary files from Fortran. Have not been able to find the documented definition of AVI file format.
View 1 Replies View RelatedI have a csv file like, having HDR segment and multiple LIN01 segment in each line:like
Here i want to split file in two, one having LIN01 segment which have LR at end, and one which have LF at end in LIN01 segment.
Is it possible to created awk or shell script for this?
I have some code that opens a directory and reads in the names of files which are e.g. 0001, 0002, 0003 up to 9999I need to get all these numbers and then generate a new number that is not one of these numbers already.here is my code to check the files in the directory
DIR *d;
struct dirent *dir;
int i = 0;
[code]....
write a script in bash or shell to add the numbers between and including two numbers
View 3 Replies View RelatedAs some of you know that I am new to this forum. I have another problem that I got stuck on. I have this file called "Fib.rbb" and my instructor told us to write an interpreter program by using Fib.rbb.
"You are to write an interpreter in Perl for Rongs Basic Basic (RBB) as explained in class. The BNF description for RBB and a test file called Fib.rbb are part of the RBB.zip file which is available in the Course Documents folder on blackboard. If you call your interpreter myIntp.pl, you would execute the program via perl myIntp.pl Fib.rbb
Code: Print "A few Fibonacci numbers:"
Looking for code to add 5 numbers in assembly? I want to use array for input of those 5 numbers. No problem if the output is 1 digit(0....9).
View 3 Replies View RelatedI am trying to extract 2 numbers from a same file and my goal is to print them both in another file, on the same line, separated with a space. I have to do that for 20 files and I would like to have therefore 20 lines like this in the output file. It would look like this :
Quote:
number1_file1 number2_file1
number1_file2 number2_file2
...
...
number_1_file20 number2_file20
So far, I did only extract one number and got an output file like this :
Quote:
number1_file1
number1_file2
...
...
number1_file20
And I did this by running a bash script with the following content :
Code:
#!/bin/bash
ls execution$1$2*.* | while read filename
do
cat $filename | grep -e "Total aborts:" | cut -d " " -f3 >> abort$1$2.dat
done
$1 and $2 are just strings to identify the different files I want to consider in this loop. This script works well to extract a number which is the 3rd field of a line starting with "Total aborts:".Now, how could I change this script to do what I mentioned above (i.e. extracting two numbers from two different lines) ? The second number is the 3rd field of a line starting with "Total throughput:"
I want the get the date of the oldest log in this directory and compare it with current date.Time of the each log can be seen before ".Z" prefix.I have written the following piece of code. However, it is not working for the following case:
LOGDAY=20101129
TODAY= 20101201
Difference is 72, which is not correct, since these are dates.
I am struggling to understand why nawk matches values that are either 1 or 2 digits in length, but not 100 (3 digits).
Am I missing something obvious ? Should I use substr to remove the % ?
I am sure it's something to do with character and string matching behaviour with nawk.
Code:
I have a program that sends QByteArray datagrams over a udp socket. I would like to have 4 bytes of the datagram that contain a 32 bit integer. When saving numbers to the QByteArray, I have tried the static function number(int) and member function setNum(int), but they convert the integer to its decimal string representation and save that in the byte array. So if the number were 10, it takes 2 bytes, if it were 10,000,000 it takes 8 bytes. This wastes space, and makes it more difficult to get the number when it is packed with a few other pieces of data in the same datagram. Is there a standard way of doing this in Qt?
View 1 Replies View RelatedI'm playing around with some shell scripting and I've got a directory call CS005 and I'm trying to write a script to I can locate to the directory really quick and easy.
export CS005DIR=/home/stud/0/043234/CS005
Now I get this error
CS005DIR=/home/stud/0/043234/CS005 No such file or directory.
This is because I've got numerical values within my variable.
Is there a way to allow numbers for variable names?
If I do:
for i in $(cat names); do seq -f "$i%03.0f" 0 999; done > output5.txt
I got ( tail snipped):
997munt
998munt
999munt
If I do:
for i in $(cat names); do seq -f "%03.0f$i" 0 999; done > output4.txt
I got:
997Zygmunt
998Zygmunt
999Zygmunt
How I can get numbers from 000 to 999 appended like:
Zygmunt997
Zygmunt998
Zygmunt999
For eg: $NUMBEROFPASSES=6.19 to round up I use NUMBEROFPASSES=$(printf %.0f $NUMBEROFPASSES) What I need to do is round up from eg: 6.10 to be 7 and if lower than 6.10 round down to 6
View 5 Replies View RelatedI would like to create a small C tool. I encounter a problem of how to make a function to check an input chars contains numbers (started from the second element).
Some samples:
char *mychar= "a3547"; (The result of function checking this is true)
char *another_char = "t6548"; (The result of function checking this is true)
char *next_char = "appl3"; (The result of function checking this is false)
char *new_char = "b1aa3"; (The result of function checking this is false)