shell脚本打印圣诞树

　　一、脚本文件
　　#!/bin/bash #用shell编写一个圣诞树 #创建时间2021-12-21 trap ＂tput reset; tput cnorm; exit＂ 2 clear tput civis lin=2 col=$(($(tput cols) / 2)) c=$((col-1)) est=$((c-2)) color=0 tput setaf 2; tput bold  # 打印树叶 for ((i=1; i<20; i+=2)) {     tput cup $lin $col     for ((j=1; j<=i; j++))     {         echo -n *     }     let lin++     let col-- }  tput sgr0; tput setaf 3  # 打印树干 for ((i=1; i<=2; i++)) {     tput cup $((lin++)) $c     echo ＂||＂ } new_year=$(date +＂%Y＂) let new_year++ tput setaf 1; tput bold tput cup $lin $((c - 6));  echo   圣 诞 节 快 乐！！！ tput cup $((lin + 1)) $((c - 10)); echo And lots of CODE in $new_year let c++ k=1  #装饰一下 while true; do     for ((i=1; i<=35; i++)) {         # Turn off the lights         [ $k -gt 1 ] && {             tput setaf 2; tput bold             tput cup ${line[$[k-1]$i]} ${column[$[k-1]$i]}; echo *             unset line[$[k-1]$i]; unset column[$[k-1]$i]          }          li=$((RANDOM % 9 + 3))         start=$((c-li+2))         co=$((RANDOM % (li-2) * 2 + 1 + start))         tput setaf $color; tput bold         tput cup $li $co         echo o         line[$k$i]=$li         column[$k$i]=$co         color=$(((color+1)%8))                 sh=1         for l in C O D E         do             tput cup $((lin+1)) $((c+sh))             echo $l             let sh++             sleep 0.02         done     }     k=$((k % 2 + 1)) done
　　二、执行脚本
　　[root@gzy-centos shell]# chmod +x tree.sh  [root@gzy-centos shell]# ./tree.sh
　　三、结果展示