实验 shell-菱形

#!/bin/bash
read -p “请输入行数:” zk
for ((i=0;i<$zk;i++))dofor((j=$zk;j>i+1;j–))
do
echo -ne " "
done
for ((n=2i+1;n>0;n–))
do
echo -ne ""
done
echo
done
for((i=$zk;i>0;i--))dofor((j=$zk-1;j>=i;j–))
do
echo -ne " "
done
for((n=0;n<2i-1;n++))
do
echo -ne ""
done
echo
done