3.43. 用if语句编写选择菜单

#!/usr/bin/env bash
#usage:xxx
#scripts_name:xxx.sh
# author：xiaojian
echo "Please choose:(1-3,or ^c)"

echo "1 vi"
echo "2 X-window"
echo "3 print-file"
echo "Ctrl+c quit"
read xyz

if [ "xyz" = 1 ]; then
    vi
    exit 1
elif [ "xyz" = 2 ];then
    startx
    exit 1
elif [ "xyz" = 3 ];then
    echo " ///Please enter filename:"
    read filename
    lp $filename &
    exit 1
else
    echo "-------------------------------------------------"
    /bin/sh 15.2
fi