shell脚本实例

1.打印形状

等腰三角形

#!/bin/bash
# 打印等腰三角形
read -p "Please input the length: " n
for i in `seq 1 $n`
do
   for ((j=$n;j>i;j--))
   do
    echo -n " " 
   done

   for m in `seq 1 $i`
   do
    echo -n "* "
   done
   echo 
done

 

倒直角三角形

#!/bin/bash
#倒直角三角形
read -p "Please input the length: " len
for i in `seq 1 $len`
do
   for j in `seq $i $len`
   do
      echo -n "* "
   done
   echo
done

 

直角三角形

#!/bin/bash
#直角三角形
read -p "Please input the length: " len
for i in `seq 1 $len`
do
    for ((j=1;j<=$i;j++))
    do
        echo -n "* "
    done
    echo
done

 

菱形

#!/bin/bash
#菱形

read -p "Please input the length: " n

for i in `seq 1 $n`
do
   for ((j=$n;j>i;j--))
   do
       echo -n " "
   done
   for m in `seq 1 $i`
   do
       echo -n "* "
   done
   echo
done

for i in `seq 1 $n`
do
   for ((j=1;j<=$i;j++))
   do
      echo -n " "
   done
   for ((k=$i;k<=$len-1;k++))
   do
      echo -n "* "
   done
   echo
done