shell打印图形

闲来无事来一发，你皮任你皮。

#!/bin/bash
echo -e "输入1打印三角形\n输入2打印矩形\n输入3打印棱形\n输入4退出脚本"
PS3="请输入对应的序号:"
read -p "请输入几层图形:" n
select input in 1 2 3 4 ;do
 case $input in
        1)
echo "三角形"
for i in `seq 1 $n`
do
  for m in `seq $[$n-$i]`
  do
        echo -n " "
  done 
  for j in `seq $i`
  do
        echo -n "*  "
  done
  echo  
done
        ;;
        2)
  echo "矩形"
for i in `seq 1 $n`
do
  for m in `seq $n`
  do
  echo -n "*    "
  done
  echo ""       
done
        ;;
        3)
  echo "棱形"
for (( i=1;i<10;i++ ))
do
 if [ $i -le 5 ];then
        for (( s=$((10-i));s>i;s-- ))
        do
        echo -n "-"
        done
        for ((m = 1; m <= $((2*i-1)); m++))
        do
#!/bin/bash
echo -e "输入1打印三角形\n输入2打印矩形\n输入3打印棱形\n输入4退出脚本"
PS3="请输入对应的序号:"
read -p "请输入几层图形:" n
select input in 1 2 3 4 ;do
 case $input in
        1)
echo "三角形"
for i in `seq 1 $n`
do
  for m in `seq $[$n-$i]`
  do
        echo -n " "
  done
  for j in `seq $i`
  do
        echo -n "*  "
  done
  echo  
done
        ;;
        2)
  echo "矩形"
for i in `seq 1 $n`
do
  for m in `seq $n`
  do
  echo -n "*    "
  done
  echo ""       
done
        ;;
        3)
  echo "棱形"
for (( i=1;i<10;i++ ))
do
 if [ $i -le 5 ];then
        for (( s=$((10-i));s>i;s-- ))
        do
        echo -n "-"
        done
        for ((m = 1; m <= $((2*i-1)); m++))
        do
        echo -n "* "
        done
        echo ""
 elif [[ $i -gt 5 ]] ;then
        n=$((10-i))
        for ((j=$((10-n));j>n;j--));do
        echo -n "-" 
        done
        for ((m = 1; m <= $((2*n-1)); m++))
        do
        echo -n "* "
        done
        echo "" 
fi
done
        ;;
        4)
        echo $0
        exit 1
 esac
done

效果展示

[root@bogon sbin]# sh san.sh 
输入1打印三角形
输入2打印矩形
输入3打印棱形
输入4退出脚本
请输入几层图形:5
1) 1
2) 2
3) 3
4) 4
请输入对应的序号1
三角形
    *  
   *  *  
  *  *  *  
 *  *  *  *  
*  *  *  *  *  
请输入对应的序号2
矩形
*    *    *    *    *    
*    *    *    *    *    
*    *    *    *    *    
*    *    *    *    *    
*    *    *    *    *    
请输入对应的序号3
棱形
--------* 
------* * * 
----* * * * * 
--* * * * * * * 
* * * * * * * * * 
--* * * * * * * 
----* * * * * 
------* * * 
--------* 
请输入对应的序号4
san.sh