Shell Programming and Scripting

 
#!/bin/bash
#------PERFORM WHEEL FACTORISATION------
echo "WHEEL FACTORISATION"
let i=0
let j=0
let filenamy=1
for Input_Number in {1..1000}
          do
# Write each 6 numbers of sequence to new temp txtfiles
if [ $i == 6 ]
          then
          filenamy=$(($filenamy+1))
          let i=0
          fi
# Output each number to a newline
          LINE1=$Input_Number
          FILE=${LINE1}
          echo -e $FILE>>/home/Gio/OutputtedFiles/Filenammies/$filenamy.txt
          i=$(($i+1))
          done
# Count the number of txtfiles to $filecounter1
cd /home/Gio/OutputtedFiles/Filenammies
let Filecounter1=`ls *.txt | wc -l` 
for (( filenamy=1; filenamy <= $Filecounter1; filenamy++ ))
          do
          # SED lines to temp txtfiles
          LINE2=`sed -n '1p' /home/Gio/OutputtedFiles/Filenammies/$filenamy.txt`
          LINE2a=`sed -n '3p' /home/Gio/OutputtedFiles/Filenammies/$filenamy.txt`
          LINE2b=`sed -n '5p' /home/Gio/OutputtedFiles/Filenammies/$filenamy.txt`
          FILE2=${LINE2}
          FILE2a=${LINE2a}
          FILE2b=${LINE2b}
          echo -e $FILE2>>/home/Gio/OutputtedFiles/oUtPuT.txt
          echo -e $FILE2a>>/home/Gio/OutputtedFiles/oUtPuT.txt
          echo -e $FILE2b>>/home/Gio/OutputtedFiles/oUtPuT.txt
          done
# Count the number of txtfiles to $filecounter1
let Filecounter1=`ls *.txt | wc -l` 
for (( filenamy=1; filenamy <= $Filecounter1; filenamy++ ))
          do
          # remove temporary txtfiles 
          rm /home/Gio/OutputtedFiles/Filenammies/$filenamy.txt
          done
 

# ------LOOPS TO RUN Sieve of Eratosthenes------
echo "Sieve of Eratosthenes"
# Calculate sqrt and round down resulting number
lastwoot=`cat /home/Gio/OutputtedFiles/oUtPuT.txt | grep "." | tail -1` 
calc=$(echo "sqrt ( $lastwoot )" | bc -l | xargs printf "%1.0f")
let calc1=$( expr $calc + 1 )
for anyname in {1..10000}
          do
          if [ $LINE2 == $calc1 ]
          then
          break
          fi
a=$anyname"p" 
LINE1=`sed -n $a /home/Gio/OutputtedFiles/oUtPuT.txt` 
FILE1=${LINE1}
let Wordcounter=`cat /home/Gio/OutputtedFiles/oUtPuT.txt|wc -w` 
let a=$( expr $Wordcounter + 1 )
for b in {1..1000}
          do
          if [ $b == $a ]
          then
          break
          fi
a=$b"p" 
LINE2=`sed -n $a /home/Gio/OutputtedFiles/oUtPuT.txt`
FILE2=${LINE2}
# Delete multiples of X  
y=`expr $FILE1 % $FILE2`
if [ $y == 0 ]
          then      
          delly=$b"d"
          sed -i $delly /home/Gio/OutputtedFiles/oUtPuT.txt
          fi
echo "$FILE1 file 1"
echo "$FILE2 file 2"
# Keep prime numbers
if [ $FILE1 == $FILE2 ]  
          then      
          echo $FILE2>>/home/Gio/OutputtedFiles/oUtPuT.txt
          fi
# Sort numbers because primes will be tagged onto end
sort -n /home/Gio/OutputtedFiles/oUtPuT.txt
# End of Loop Two
done
# End of Loop One
done