10-10-2001
10 More Discussions You Might Find Interesting
1. IP Networking
i am writing a client and server program
client program
main()
{
int sockfd,n;
char str;
struct sockaddr_in sock;
if ((sockfd=socket(AF_INET,SOCK_STREAM,0))<0)
{
perror("SOCKET ERROR");
}
bzero(&sock,sizeof(sock));
sock.sin_family=AF_INET; (1 Reply)
Discussion started by: ramneek
1 Replies
2. Shell Programming and Scripting
Hi,
I did a df|awk| command and it returns a percentage "94%",
how could I only get the integer part
"94" out of it, so I can compare it to another number,
I knwo that I have to pipe it to sth, but "grep " did not work, it still give me number WITH the percentage, does someone know what... (3 Replies)
Discussion started by: ericaworld
3 Replies
3. Shell Programming and Scripting
Hi ,
I have code like below in my ksh script, but getting an error as SP2-0253: data item 1 ("SAMPLE_ID") will not fit on line , pls help me. thanks.
if (( CHECKS == 0 )) || (( CHECKS == 1 ))
then
V_SAMPLE_ID=$( $ORACLE_HOME/bin/sqlplus -S / <<EOF
whenever sqlerror exit 1... (5 Replies)
Discussion started by: bennichan
5 Replies
4. Shell Programming and Scripting
i have created a script that will reverse any given ineter.
#!/bin/ksh
echo "Enter the number"
read n
if
then
a=`expr $n / 10`
b=`expr $n % 10`
c=`expr $b \* 10 + $a`
fi
echo $c
---------------------------------------------------------------------
the problem with this script... (4 Replies)
Discussion started by: ali560045
4 Replies
5. UNIX for Dummies Questions & Answers
I have search the forum for an easier way to write this code. I have two separate 'if' to do this and it works but am wondering if someone knows a quick way to combine them. I want anything between 1 and 100 but not '01' or '005', '0010', etc.
if ) ]] ||
]; then
echo "Try... (3 Replies)
Discussion started by: giannicello
3 Replies
6. UNIX for Dummies Questions & Answers
Hey I am trying to calculate a number but I found out the expr I knew works only with integers. Any help. I want to calculate (120/220) *100.
Thanks! (2 Replies)
Discussion started by: #moveon
2 Replies
7. Shell Programming and Scripting
Hi folks,
I have a value like A12,i could able to change this into integer using typeset as below
typeset -i A12
But, I need your advice to change the values like 1A2 or 12A into integer.
Thanks in advance.
Thanks,
Sathish (3 Replies)
Discussion started by: bsathishmca
3 Replies
8. Linux
I am migrating some shell script from Unix to Linux and i am getting wrong value for integer variable.
In Unix:
integer X=007300
echo $X
7300
In Linux:
integer X=007300
echo $X
3776
Please help me why it is giving wrong output. (1 Reply)
Discussion started by: prav_chidugulla
1 Replies
9. Shell Programming and Scripting
hi,
how to I do this?
i="4.000"
if ; then
echo "smaller"
fi
how do I convert the "4.000" to 4?
Thanks! (4 Replies)
Discussion started by: h0ujun
4 Replies
10. Shell Programming and Scripting
I am on HP-UX using ksh in the script.
MaxSal=`sqlplus -silent /nolog <<EOF
connect / as sysdba
whenever sqlerror exit sql.sqlcode
set pagesize 0 feedback off verify off heading off echo off
select max(sal) from emp1;
select max(sal) from emp2;
select max(sal) from emp3;
exit;
EOF`... (3 Replies)
Discussion started by: bang_dba
3 Replies
RAND(3) Linux Programmer's Manual RAND(3)
NAME
rand, srand - random number generator.
SYNOPSIS
#include <stdlib.h>
int rand(void);
void srand(unsigned int seed);
DESCRIPTION
The rand() function returns a pseudo-random integer between 0 and RAND_MAX.
The srand() function sets its argument as the seed for a new sequence of pseudo-random integers to be returned by rand(). These sequences
are repeatable by calling srand() with the same seed value.
If no seed value is provided, the rand() function is automatically seeded with a value of 1.
RETURN VALUE
The rand() function returns a value between 0 and RAND_MAX. The srand() returns no value.
NOTES
The versions of rand() and srand() in the Linux C Library use the same random number generator as random() and srandom(), so the lower-
order bits should be as random as the higher-order bits. However, on older rand() implementations, the lower-order bits are much less ran-
dom than the higher-order bits.
In Numerical Recipes in C: The Art of Scientific Computing (William H. Press, Brian P. Flannery, Saul A. Teukolsky, William T. Vetterling;
New York: Cambridge University Press, 1992 (2nd ed., p. 277)), the following comments are made:
"If you want to generate a random integer between 1 and 10, you should always do it by using high-order bits, as in
j=1+(int) (10.0*rand()/(RAND_MAX+1.0));
and never by anything resembling
j=1+(rand() % 10);
(which uses lower-order bits)."
Random-number generation is a complex topic. The Numerical Recipes in C book (see reference above) provides an excellent discussion of
practical random-number generation issues in Chapter 7 (Random Numbers).
For a more theoretical discussion which also covers many practical issues in depth, please see Chapter 3 (Random Numbers) in Donald E.
Knuth's The Art of Computer Programming, volume 2 (Seminumerical Algorithms), 2nd ed.; Reading, Massachusetts: Addison-Wesley Publishing
Company, 1981.
CONFORMING TO
SVID 3, BSD 4.3, ISO 9899
SEE ALSO
random(3), srandom(3), initstate(3), setstate(3)
GNU
1995-05-18 RAND(3)