Question

Write a bash program. Let the user select arbitrarily a number between 1 to 200. Let the program guess that number.

When the number guess is equal to the number selected by the user then the user will input "Y" (standing for yes). When the guess number is less than the selected number, the user inputs "L" (standing for less) and "M" otherwise. Let the program make minimum number of guesses

Answer 1

function guess {
  [[ -n $BASH_VERSION ]] && shopt -s extglob
  [[ -n $ZSH_VERSION ]] && set -o KSH_GLOB
  local -i max=${1:-200}
  local -i number=RANDOM%max+1
  local -i guesses=0
 
  local guess
  while true; do
    echo -n "Guess my number! (range 1 - $max): "
    read guess
    if [[ "$guess" != +([0-9]) ]] || (( guess < 1 || guess > max )); then
      echo "Guess must be a number between 1 and $max."
      continue
    fi
    let guesses+=1
    if (( guess < number )); then
      echo "Too low!"
    elif (( guess == number )); then
      echo "You got it in $guesses guesses!"
      break
    else
      echo "Too high!"
    fi
  done
}

sample :

$ guess
Guess my number! (range 1 - 100): 50
Too low!
Guess my number! (range 1 - 100): 75
Too high!
Guess my number! (range 1 - 100): 62
Too low!
Guess my number! (range 1 - 100): 69
Too low!
Guess my number! (range 1 - 100): 72
You got it in 5 guesses!