Question

Program in Bash: Write a program using bash script that can read a file from the same directory, sort the nonrepeating integers from 0-9 from smallest to largest, and output the results on the same line. Do not use the sort function.

Answer 1

ANSWER:

I have provided the properly commented and indented code so you can easily copy the code as well as check for correct indentation.
I have provided the output image of the code so you can easily cross-check for the correct output of the code.
Have a nice and healthy day!!

CODE

# defining file name
file='file.txt'
# defining empty array 
arr=()
# counter for array
i=1
# looping to each line of file
while read line; do  
  #Reading each line  
  # storing value to array
  arr[i]=$line
  # incrementing loop counter
  i=$((i+1))  
done < $file
# displaying array 
echo "Array is: ${arr[@]}"

# Performing Bubble sort 
# fetching length of array
n=${#arr[@]}

# looping for bubble sort 
# looping for each element in array 
for ((i = 0; i<$n; i++)) 
do
    # placing greatest value to n-i-1
    for((j = 0; j<$((n-i-1)); j++)) 
    do
        # checking for condition to swap
        if [ ${arr[j]} -gt ${arr[$((j+1))]} ] 
        then
            # swaping element
            temp=${arr[j]} 
            arr[$j]=${arr[$((j+1))]}   
            arr[$((j+1))]=$temp 
        fi
    done
done

# displaying sorted array
echo "Sorted Array: ${arr[@]}"

INPUT IMAGE(file.txt)

OUTPUT IMAGE