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Full Discussion: magic 8ball
Top Forums UNIX for Dummies Questions & Answers magic 8ball Post 302308896 by JamieMurry on Monday 20th of April 2009 01:59:39 PM
Old 04-20-2009
magic 8ball
when i use this code for the script of the magic 8ball, i get an error message and it always displays the sam answer. What am i doing wrong or what am i missing thanks

#!/bin/sh
#< Magic eight ball!
# KW 26/11/04
# Requires "rand"

echo "Enter \"q\" followed by return to quit"

function ask_it
{
echo -e "\nAsk the mysterious 8-ball a question..."
read question
}

ask_it

while [ "$question" != "q" ]; do
rand=`rand 100`
if [ "$rand" -lt "10" ]; then
echo "It is definite"
elif [ "$rand" -lt "20" ]; then
echo "It is looking probable"
elif [ "$rand" -lt "30" ]; then
echo "There is great certainty"
elif [ "$rand" -lt "40" ]; then
echo "Maybe"
elif [ "$rand" -lt "50" ]; then
echo "It doesn't look promising"
elif [ "$rand" -lt "60" ]; then
echo "Probably not"
elif [ "$rand" -lt "70" ]; then
echo "A definite no"
elif [ "$rand" -lt "80" ]; then
echo "All the signs point to yes"
elif [ "$rand" -lt "90" ]; then
echo "All the signs point to no"
else
echo "Who can be sure? I'm not..."
fi
ask_it
done

exit 0
 

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LEARN ABOUT OPENSOLARIS

rand

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

       cc(1B), 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 5.11							    30 Oct 2007 							rand(3UCB)
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