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_r
rand(3C) Standard C Library Functions rand(3C)
NAME
rand, srand, rand_r - simple random-number generator
SYNOPSIS
#include <stdlib.h>
int rand(void);
void srand(unsigned int seed);
int rand_r(unsigned int *seed);
DESCRIPTION
The rand() function uses a multiplicative congruential random-number generator with period 2^32 that returns successive pseudo-random num-
bers in the range of 0 to RAND_MAX (defined in <stdlib.h>).
The srand() function uses the argument seed as a seed for a new sequence of pseudo-random numbers to be returned by subsequent calls to
rand(). If srand() is then called with the same seed value, the sequence of pseudo-random numbers will be repeated. If rand() is called
before any calls to srand() have been made, the same sequence will be generated as when srand() is first called with a seed value of 1.
The rand_r() function has the same functionality as rand() except that a pointer to a seed seed must be supplied by the caller. If
rand_r() is called with the same initial value for the object pointed to by seed and that object is not modified between successive calls
to rand_r(), the same sequence as that produced by calls to rand() will be generated.
The rand() and srand() functions provide per-process pseudo-random streams shared by all threads. The same effect can be achieved if all
threads call rand_r() with a pointer to the same seed object. The rand_r() function allows a thread to generate a private pseudo-random
stream by having the seed object be private to the thread.
USAGE
The spectral properties of rand() are limited. The drand48(3C) function provides a better, more elaborate random-number generator.
When compiling multithreaded applications, the _REENTRANT flag must be defined on the compile line. This flag should be used only in mul-
tithreaded applications.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Safe |
+-----------------------------+-----------------------------+
SEE ALSO
drand48(3C), attributes(5), standards(5)
SunOS 5.11 19 May 2004 rand(3C)