打印国际象棋棋盘

效果如下图：

#!/bin/bash
#设置两个变量，i 和 j，一个代表行，一个代表列，国际象棋为 8*8 棋盘
#i=1 是代表准备打印第一行棋盘，第 1 行棋盘有灰色和蓝色间隔输出，总共为 8 列
#i=1，j=1 代表第 1 行的第 1 列；i=2,j=3 代表第 2 行的第 3 列
#棋盘的规律是 i+j 如果是偶数，就打印蓝色色块，如果是奇数就打印灰色色块
#使用 echo ‐ne 打印色块，并且打印完成色块后不自动换行，在同一行继续输出其他色块
for i in {1..8}
do
for j in {1..8}
do
   sum=$[i+j]
   if [  $[sum%2] ‐eq 0 ];then
     echo ‐ne "\033[46m  \033[0m"
else
     echo ‐ne "\033[47m  \033[0m"
   fi
done
echo
done

#!/bin/bash
#set chess cell's width
read -p "Please set the chess cell's width( two space width as unit ):" width
if [[ $width =~ "^[0-9]+$" ]];then
  echo "wrong width setting, check your input and try again."
  exit
fi
let width=$width*2
#choose player's board cell color
player="player1"
PS3="Which color do you want to set for $player :"
select choice in red green yellow blue purple cyan white;do
  case $REPLY in
  [1-7])
    if [[ $player == player2 ]];then
      declare -i color2=$REPLY
      break
    else
      declare -i color1=$REPLY
    fi
    player="player2"
    PS3="Which color do you want to set for $player :"
    ;;
  *)
    ;;
  esac
done
if (( color1==color2 ));then
  echo "two player must choose different color, check your choice and try again."
  exit
fi
#print the chess board
for (( i=0; i<4; i++ )); do
  for (( j=0; j<$width/2; j++ ));do
    for (( k=0; k<4; k++ ));do
      echo -e "\e[4${color1}m$(printf %${width}s)\e[0m\c"
      echo -e "\e[4${color2}m$(printf %${width}s)\e[0m\c"
    done
    echo
  done
  for (( j=0; j<$width/2; j++ ));do
    for (( k=0; k<4; k++ ));do
      echo -e "\e[4${color2}m$(printf %${width}s)\e[0m\c"
      echo -e "\e[4${color1}m$(printf %${width}s)\e[0m\c"
    done
    echo
  done
done