while循环问题

复制内容到剪贴板

代码:

#!/bin/bash
declare flag="1"
while [ "$flag" -eq "1" ]
  do
    clear
    echo " "
    echo "The Telephone Book"
    echo " "
    echo "1. Dsiplay A Telephone Number"
    echo "2. Add A New Telephone Nubmer"
    echo " "
    echo "Q Quit"
    echo " "
    echo "Enter your selection:"
    read selection
    case $selection in
    1)
      echo "you want to display a telephone number:"

      ;;
    2)
      echo "you want to add a new telephone number;"
     ;;
    "q")
       $flag="0"
   esac
done