shell 基础进阶 *金字塔

  1 #!/bin/bash
  2 
  3 read -p "输入金字塔层数: " line
  4 
  5 for((i=1;i<=line;i++))
  6 do
  7         for((j=1;j<=i;j++))
  8         do
  9                 echo -n "*"
 10         done
 11         echo
 12 done

[root@logan day3]# bash jzt.sh 
输入金字塔层数: 5

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  1 #!/bin/bash
  2 
  3 read -p "输入金字塔层数: " line
  4 for((i=1;i<=line;i++))
  5 do
  6         for((k=1;k<=line-i;k++))
  7         do
  8                 echo -n " "
  9         done
 10         for((j=1;j<=2*i-1;j++))
 11         do
 12                 echo -n "*"
 13         done
 14         echo
 15 done

输入金字塔层数: 5
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1 #!/bin/bash
  2 
  3 read -p "输入金字塔层数: " line
  4 for((i=1;i<=line;i++))
  5 do
  6         for((k=1;k<=line-i;k++))
  7         do
  8                 echo -n " "
  9         done
 10         for((j=1;j<=2*i-1;j++))
 11         do
 12                 if [ $i -eq 1 -o $i -eq $line ]
 13                 then
 14                         echo -n "*"
 15                 else
 16                         if [ $j -eq 1 -o $j -eq $((2*$i-1)) ]
 17                         then
 18                                 echo -n "*"
 19                         else
 20                                 echo -n " "
 21                 fi
 22         fi
 23         done
 24         echo
 25 done

输入金字塔层数: 5
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