rand(3) Library Functions Manual rand(3)Name
rand, srand - random number generator
Syntax
#include <stdlib.h>
void srand(seed)
unsigned seed;
rand()
Description
The newer should be used in new applications. The subroutine remains for compatibility.
The subroutine uses a multiplicative congruential random number generator with period 232 to return successive pseudo-random numbers in the
range from 0 to 231-1.
The generator is reinitialized by calling with 1 as argument. It can be set to a random starting point by calling with whatever you like
as argument.
Environment
For the System V environment, the subroutine returns numbers in the range from 0 to 215-1.
See Alsorandom(3)rand(3)
Check Out this Related Man Page
rand(3UCB) SunOS/BSD Compatibility Library Functions rand(3UCB)NAME
rand, srand - simple random number generator
SYNOPSIS
/usr/ucb/cc[ flag ... ] file ...
int rand()
int srand( seed);
unsigned seed;
DESCRIPTION
rand() uses a multiplicative congruential random number generator with period 2**32 to return successive pseudo-random numbers in the range
from 0 to "2**31 -1."
srand() can be called at any time to reset the random-number generator to a random starting point. The generator is initially seeded with a
value of 1.
SEE ALSO drand48(3C), rand(3C), random(3C)NOTES
Use of these interfaces should be restricted to only applications written on BSD platforms. Use of these interfaces with any of the system
libraries or in multi-thread applications is unsupported.
The spectral properties of rand() leave a great deal to be desired. drand48(3C) and random(3C) provide much better, though more elaborate,
random-number generators.
The low bits of the numbers generated are not very random; use the middle bits. In particular the lowest bit alternates between 0 and 1.
SunOS 5.10 12 Feb 1993 rand(3UCB)
One way of getting epoch time in solaris is
truss date 2>&1 | awk '/^time/{print $3}'
Is there any other simple command that can be run from Korn Shell to display epoch time in solaris 5.10? (3 Replies)
Hi,
Do anybody knows how to use awk or any command to random print out 1000 number which start from range 1 to 150000?
I know that "rand" in awk can do similar random selection.
But I have no idea how to write a code that can random pick 1000 number from range 1 to 150000 :confused:
... (1 Reply)
Hi,
Is anybody experience generate a pair of random number by using awk command?
I wanna to generate a pair of random number (range from 1 to 4124) and repeats it 416 times.
Desired output
2 326
123 1256
341 14
3245 645
.
.
.
I did write the below command:
awk... (5 Replies)
Ok guys, gals and geeks...
As from today I am starting to learn awk in earnest doing something totally different.
I am going to create a pseudo-Audio_Function Generator centred around OSX 10.11.x minimum. The code below is a tester to see what the possibilities are.
All waveforms will be... (11 Replies)
I have a file contains thousands of lines. I want to insert n random numbers into each line at
specific position. Like this:
0 22……
1 33……
……
……
I want to insert 3 random numbers from position 2 to 4 into each line.
0 325 22……
1 685 33……
……
……
Please use CODE tags when... (8 Replies)
Hi Guys and gals...
As you know I am getting to grips with POSIX and hit this stumbling block.
Generating two random numbers 0 to 255 POSIXly. Speed in not important hence the 'sleep 1' command.
I have done a demo that works, but it sure is ugly! Is there a better way?
#!/bin/sh
# Random... (12 Replies)
Hi to everybody
again i Need your help, i wasting hours but can't find a solutuin for my Problem. I am not an expert with AIX script programming.
I have a csh script and i need the time in seconds but since i have an old AIX the Option -%s doesnot exist with the date command. I seach in Google... (13 Replies)
Hi there, friends!
Writing exams again! This time my wish would be to randomize certain columns in a csv file. Given a file containing records consisting of 3 columns tab-separated:
A B C
A B C
A B C
I would love to get the columns of each record in random order...separated by a tab as... (12 Replies)
Hey,
Just added a new UserCP option so you can change the code tags to look like the code tags in this example (turn this on and off):
Note: I set the default to "SyntaxHighlighting" for debugging purposes. We can change the default back to the original code tags later.
... (36 Replies)
Having trouble with the logic when looping over this switch case again:
for (j = 0; data != 0; j++){
switch(data){
case 'c':
output = ranit(r_brace_array);
break;
case 'h':
output = ranit(pipe_array);
break;
... (6 Replies)
current date command runs well
awk -v t="$(date +%Y-%m-%d)" -F "'" '$1 < t' myname.dat
subtract 30 days fails
awk -v t="$(date --date="-30days" +%Y-%m-%d)" -F "'" '$1 < t' myname.dat
awk command in hp unix subtract 30 days automatically from current date without date illegal option error... (20 Replies)