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Homephp教程php手册PHP中使用循环实现的金字塔图形,php循环金字塔图形

PHP中使用循环实现的金字塔图形,php循环金字塔图形

今天学习了最基础的PHP条件和循环语句,最后老师提了几个问题,其中一个实现空心金字塔的图像比较好玩。

老师要让我们实现的是:

     *

    * *

   * * *  的空心金字塔。

第一种:

复制代码 代码如下:

for ($i=1;$i         switch ($i){
            case 1:
                echo "  "."*"."  ";
                break;
            case 2:
                echo "     ";
                break;
            case 3:
                echo " "."*"." "."*"." ";
                break;
            case 4:
                echo "     ";
                break;
            case 5:
                echo "*"." "."*"." "."*";
                break; 
        }
    echo "
";

实现效果就是老师要求的图像,不过老师觉得应该还有更简单的实现方式,可以将空格和*号分开输出;

于是就有了第二种:

复制代码 代码如下:


for($a=0;$a         for($b=4;$b>$a;$b--){
            echo " ";
        }
        for($c=1;$c             echo "*";
        }
        for($d=0;$d             echo "*";
        }
        echo "
";
    }

这个实现的效果就没有刚才那种中间空心的了,效果如下:

      *
     ***
      *****
     ******* 

这个还没有实现空心,待会再试试,今天第一篇博客算完成了,希望以后可以长写。

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