三角形
#!/bin/bash
read -p 'input number: ' a
for ((i=1;i<=$a;i++));do
for ((j=((2*${a}-2*${i}));j>=0;j--));do
echo -e " \c"
done
for ((k=1;k<=((2*${i}-1));k++));do
echo -e " *\c"
done
echo
done
正方形
#!/bin/bash
read -p 'input: ' a
for ((i=1;i<=$a;i++));do
for ((j=1;j<=$a;j++));do
echo -e "■ \c"
done
echo
done
梯形
read -p 'input: ' a b
for ((i=$a;i<=$b;i++));do
for ((j=1;j<=$i;j++));do
echo -e "*\c"
done
echo
done