Shell script to generate Fibonacci series using recursion


 
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Old 12-08-2009
Shell script to generate Fibonacci series using recursion

I am facing problem with Shell script to generate Fibonacci series using recursion i.e. recursive function.
Here is my script:
Code:
#!/bin/sh

fibo()
{
    no=$1
    if [ $no -eq 1 ]; then
        return 0
    elif [ $no -eq 2 ]; then
        return 1
    else
        a1=`expr $no - 1`
        fibo $a1
        a=$(echo $?)

        b1=`expr $no + 1`
        fibo $b1
        b=$(echo $?)

        c=`expr $a + $b`
        return $c
    fi
}

####### Main

clear

echo -e "Enter number of terms : \c"
read n

if [ $n -gt 0 ]; then
    for (( i=1; i<=$n; i++ ))
    do
        fibo $i
        echo $?    
    done
else
    echo -e "Invalid input."
fi

But it does not give output.
Please help...
 
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ADSL-STOP(8)						      System Manager's Manual						      ADSL-STOP(8)

NAME
adsl-stop - Shell script to shut down a PPPoE link SYNOPSIS
adsl-stop [config_file] DESCRIPTION
adsl-stop is a shell script which stops the Roaring Penguin user-space PPPoE client. If you omit config_file, the default file /etc/sysconfig/network-scripts/ifcfg-ppp0 is used. AUTHOR
adsl-stop was written by David F. Skoll <dfs@roaringpenguin.com>. The pppoe home page is http://www.roaringpenguin.com/pppoe/. SEE ALSO
pppoe(8), adsl-start(8), adsl-connect(8), pppd(8), pppoe.conf(5), adsl-setup(8), adsl-status(8), pppoe-sniff(8), pppoe-relay(8), pppoe- server(8) 4th Berkeley Distribution 21 February 2000 ADSL-STOP(8)