assignment5Q2

#!bin/bash


run=1
while (run=1); do
echo "hi"
    echo "Do you want to add(a), subtract(b), multiply(c), divide(d), or exit(e)?"
    read input
    if [[ $input == "a" ]]; then
        add
    elif [[ $input == "b" ]]; then
        subtract
    elif [[ $input == "c" ]]; then
        multiply
    elif [[ $input == "d" ]]; then
        divide
    elif [[ $input == "e" ]]; then
        exit
    else
        echo "Unexpected input, try again"
    fi

done

add () {
echo "Please enter two numbers whole numbers your adding and the sum"
  read -r one
  read -r two
  read -r three
  result=$(($one +$two))
  if [[ $three -eq $result ]]; then
  echo "correct"

  else
  echo "false"
  fi
  run=0
  return $run
}

subtract () {
  echo "Please enter two numbers numbers your subtracting and the result"
  read -r one
  read -r two
  read -r three
  result=$(($one - $two))
  if [[ $three -eq $result ]]; then
  echo "Correct! The answer is $three"

  else
  echo "Wrong! The answer was $result"
  fi
  run=0
  return $run
}

divide () {
  echo "Please enter two numbers numbers your divided and the answer"
  read -r one
  read -r two
  read -r three
  result=$(($one / $two))
  if [[ $three = 0 ]]; then
  echo "Error! You can't divide by zero"

  elif [[ $three -eq $result ]]; then
  echo "Correct! The answer is $result"

  else
  echo "Wrong! The answer was $result"
  fi
  run=0
  return $run
}

multiply () {
    echo "Please enter two numbers numbers your multiplying and the answer"
    read -r one
    read -r two
    read -r three
    result=$(($one * $two))
    if [[ $result -eq $three ]]; then
    echo "Correct! The answer is $three"

    else
    echo "Wrong! The answer was $result"
    fi
    run=0
  return $run
}

exit () {
  echo "Goodbye"
  run=0
  return $run
}