Alright, umm i cant get this to work.
im looking at some example and a book i have.
when i try to compile my program i get an error message.
ld: 0711-317 ERROR: Undefined symbol: .sqrt
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information. I did #include<math.h> after my... (2 Replies)
Hi, I got an easy problem for you but really difficult for me 'cause I am pretty new to this field
I got header file <math.h> included in my .c file , then I write the code as below:
k = sqrt(i); /* both variables k and i are int */
then I cc temp.c
it says like this
undefined... (4 Replies)
I want to calculate secant method using C language
That is a program---->
#include<stdio.h>
#include<math.h>
#include<stdlib.h>
main()
{
double fx(double x);
double x0,x1,x2,f0,f1,f2,err;
int n,i;
printf("\n\n f(x) =x*x*x-5*x-7");
printf("\n\nEnter an interval in"
... (4 Replies)
Hey all,
How do I link the math library in a gnu make makefile? I have tried using -lm with the CFLAGS varibale - flags like -Wall and -ggdb work, but -lm does not. I am running gcc - 4.1.2 on a linux machine. (2 Replies)
I have 2 variables
a=2
b=1
i want to add a and b
how do i do this in unix using just the echo command and by assigning it to a different variable like c? (13 Replies)
I am trying to do some math, so that I can compare the average of six numbers to a variable.
Here is what it looks like (note that when I divide really big numbers, it isn't a real number):
$ tail -n 6 named.stats | awk -F\, '{print$1}'
1141804
1140566
1139429
1134210
1084682
895045... (3 Replies)
Hi all,
I am new to PERL scripts, and i have made my first script which i am posting here.
This math tool performs all basic arithmatic functions.
#!/usr/bin/perl
print "\t----------Welcome to Maths Tool-----------\n";
do
{
print "Enter your choice :";
print... (2 Replies)
I have
int miles, yards;
float kilometers;
float kilometers2;
miles = 26;
yards = 385;
kilometers = 1.609 * (miles + yards / 1760.0);
where int/float remains a float. How ever if I change it to
kilometers = 1.609 * (miles + yards / 1760);
... (7 Replies)
I am struggling with scripting this challenge a friend and I have.
You have file1 and its contents is a single number
you have file 2 and its contents are a different number
you want to add file1 to file2 and have the output be put into file3 (3 Replies)
Discussion started by: minkyboodle
3 Replies
LEARN ABOUT DEBIAN
bup-margin
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)