#comment
#freeze

#!/bin/bash
#base href = https://www.serverproject.de
#this is toodoo intro version < 1
#it is evaluation, examination, experiment and exercise
#the code is commented in english
#fragile || predictable
#temp

#retrieve name
var0=`basename "$0"`;
#output name
echo $var0;
#blob
URL=https://github.com/ewingson/edx-02-intro/blob/master/intro

#retrieve arguments to var1 to var5
var1=$1;
var2=$2;
var3=$3;
var4=$4;
var5=$5;

#COUNTER (not yet used)
#count[1]=$var1;
#count[2]=$var2;
#count[3]=$var3;
#count[4]=$var4;
#count[5]=$var5;

#alternative extreme array conscience programming (rule conform)
self[0]=$var1
self[1]=$var2
self[2]=$var3
self[3]=$var4
self[4]=$var5

#output and count arguments
j=0
for i in ${self[@]}; do
echo $i
j+=1
done
slength="$j"
size=${#slength}
#echo $COUNTER

#toodoo
#we must check if arguments are set

#boole b1 must be set if argument $1 exists (!-ne)
if [ -n $var1 ]
  then
        b1=false
else
	b1=true 
fi
#boole b2
if [ -n $var2 ]
  then
        b2=false
else
	b2=true 
fi
#boole b3
if [ -n $var3 ]
  then
        b3=false
else
	b3=true 
fi
#boole b4
if [ -n $var4 ]
  then
        b4=false
else
	b4=true 
fi
#boole b5
if [ -n $var5 ]
  then
        b5=false
else
	b5=true 
fi
#now we have all we need

#check the five boolean
if [[ $b1=true || $b2=true || $b3=true || $b4=true || $b5=true ]];
then flag=1
else flag=0
fi
    if [ $flag=1 ]
    then
#whether exists or not output status and argument 
            if [ $b1=true ]
            then
            echo argument ${var1} exists
#other case
            else
            echo argument ${var1} does not exist
            fi
            if [ $b2=true ]
            then
            echo argument ${var2} exists
            else
            echo argument ${var2} does not exist
            fi
		    if [ $b3=true ]
            then
            echo argument ${var3} exists
            else
            echo argument ${var3} does not exist
            fi
            if [ $b4=true ]
            then
            echo argument ${var4} exists
            else
            echo argument ${var4} does not exist
            fi
            if [ $b5=true ]
            then
            echo argument ${var5} exists
            else
            echo argument ${var5} does not exist
            fi
    else
#error message and exit if invalid number of arguments
    echo "Arguments are zero or > 5"
#exit 1
    exit 1
    fi
#array syntax is variable[index]=$value
arrlength=$size-1;
echo $size;

#toodoo
#we want printf(%d total %d arguments, $size, $arrlength);

#toodoo
#direction = (0 || 1 || 2038 || x203x || 4 || (5 && true))

#SI-Einheiten

#SI seconds for light to sun
sun=8*60
#SI seconds for lifetime sun
runtime=5000000000*365*24*60*60
#SI speed of light in meter/second
lightspeed=299792458
#SI distance light makes in a year in meter/year
lightyear=9460730472580800
#alphabet
alphabet="abcdefghijklmnopqrstuvwxyz"

#if (variable0=true)
#{
#ping 2a01:488:42:1000:50ed:854a:cc:d5a8
#}

#exit 0
exit 0

https://github.com/ewingson/edx-02-intro