PHP实现简易图形计算器

吾爱主题阅读：123 2021-10-25 14:09:00 评论：0

本文实例为大家分享了PHP实现简易图形计算器的具体代码，供大家参考，具体内容如下

主函数：index.php

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 <!doctype html> < html > < head > < meta charset = "utf-8" > < title >图形计算器</ title > < style > * { margin: 0px; padding: 0px; } #contains { width: 500px; margin: 20px auto; background: #0C0; text-align: center; } h1 { width: 500px; height: 60px; } a { font-size: 20px; text-decoration: none; } #footer { width: 300px; background: #fff; margin: 0 auto; padding: 5px 10px; border-radius: 150px; } </ style > </ head > < body > < div id = "contains" > < h1 >简易图形计算器</ h1 > < a href = 'index.php?action=rect' >矩形</ a > | < a href = 'index.php?action=triangle' >三角形</ a >| < a href = 'index.php?action=cirle' >圆形</ a > < hr > <? php ini_set("display_errors", "On"); //开启错误调试 //设置错误报告的级别，除了无关紧要的'注意'，其他的报告都输出 error_reporting(E_ALL & ~E_NOTICE); function __autoload($classname) { //魔术方法自动加载类 include strtolower($classname).".class.php"; //将类名转化成小写 } // include "shape.class.php"; // include "rect.class.php"; if (!empty($_GET['action'])) { // echo "传送成功"; $ classname = ucfirst ($_GET['action']); $ shape = new $classname($_POST); $shape->view($_POST); if (isset($_POST['sub'])) { echo "< div id = 'footer' >"; if ($shape->yan($_POST)) { echo "< b >".$shape->name."的周长".$shape->zhou()."</ b >"."< br >"; echo "< br >"; echo "< b >".$shape->name."的面积".$shape->area()."</ b >"."< br >"; }else { echo "< b >错误：$shape->error</ b >"; } echo "</ div >"; } } else { echo "请选择一个图形"; } ?> </ div > </ body > </ html >

先定义一个抽象类

1 2 3 4 5 6 7 8 9 10 <?php abstract class Shape { private $name ; private $error ; abstract function area(); abstract function zhou(); abstract function view( $arr ); abstract function yan( $arr ); } ?>

矩形类的编写

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 <?php class Rect extends Shape { private $width ; private $height ; function __construct( $arr = array ()) { if (! empty ( $arr )) { $this ->width = $arr [ 'width' ]; $this ->height = $arr [ 'height' ]; } $this ->name = "矩形" ; $this ->error = '' ; } function area() { return $this ->width * $this ->height; } function zhou() { return ( $this ->width+ $this ->height) * 2; } function view( $arr ) { $form .= "<form action='index.php?action=rect' method='post'>" ; $form .= "请输入" . $arr [ 'name' ]. "的宽度：<input type='text' name='width' value='" . $_POST ['width ']."' /><br>"; $form .= "<br>" ; $form .= "请输入" . $arr [ 'name' ]. "的长度：<input type='text' name='height' value='" . $_POST ['height ']."' /><br>"; $form .= "<br>" ; $form .= "<input type='submit' name='sub' value='提交'/> " ; $form .= "<input type='reset' name='ret' value='重置'/>" ; $form .= "</form>" ; echo $form ; } function yan( $arr ) { $bz = true; if ( $arr [ 'width' ]< 0) { $this ->error .= "宽度小于0；" ; $bz = false; } else { if (! is_numeric ( $arr [ 'width' ])) { $this ->error .= "宽不是数字；" ; $bz = false; } } if ( $arr [ 'height' ]< 0) { $this ->error .= "宽度小于0；" ; $bz = false; } else { if (! is_numeric ( $arr [ 'height' ])) { $this ->error .= "高不是数字；" ; $bz = false; } } return $bz ; } } ?>

三角形类：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 <?php class Triangle extends Shape { private $bian1 ; private $bian2 ; private $bian3 ; function __construct( $arr = array ()) { if (! empty ( $arr )) { $this ->bian1 = $arr [ 'bian1' ]; $this ->bian2 = $arr [ 'bian2' ]; $this ->bian3 = $arr [ 'bian3' ]; } $this ->name = "三角形" ; $this ->error = '' ; } function area() { $p = ( $this ->bian1 + $this ->bian2 + $this ->bian3) / 2; // p(p-a)(p-b)(p-c) return sqrt( $p *( $p - $this ->bian1)*( $p - $this ->bian2)*( $p - $this ->bian3)); } function zhou() { return $this ->bian1+ $this ->bian2+ $this ->bian3; } function view( $arr ) { $form .= "<form action='index.php?action=triangle' method='post'>" ; $form .= "请输入" . $arr [ 'name' ]. "的第一条边：<input type='text' name='bian1' value='" . $_POST ['bian1 ']."' /><br>"; $form .= "<br>" ; $form .= "请输入" . $arr [ 'name' ]. "的第二条边：<input type='text' name='bian2' value='" . $_POST ['bian2 ']."' /><br>"; $form .= "<br>" ; $form .= "请输入" . $arr [ 'name' ]. "的第三条边：<input type='text' name='bian3' value='" . $_POST ['bian3 ']."' /><br>"; $form .= "<br>" ; $form .= "<input type='submit' name='sub' value='提交'/> " ; $form .= "<input type='reset' name='ret' value='重置'/>" ; $form .= "</form>" ; echo $form ; } function yan( $arr ) { $bz = true; if ( $arr [ 'bian1' ]< 0) { $this ->error .= "第一条边小于0；" ; $bz = false; } else { if (! is_numeric ( $arr [ 'bian1' ])) { $this ->error .= "第一条边不是数字；" ; $bz = false; } } if ( $arr [ 'bian2' ]< 0) { $this ->error .= "第二条边小0；" ; $bz = false; } else { if (! is_numeric ( $arr [ 'bian2' ])) { $this ->error .= "第二条边不是数字；" ; $bz = false; } } if ( $arr [ 'bian2' ]< 0) { $this ->error .= "第三条边小于0；" ; $bz = false; } else { if (! is_numeric ( $arr [ 'bian2' ])) { $this ->error .= "第三条边不是数字；" ; $bz = false; } } if (( $this ->bian1+ $this ->bian2) < $this ->bian3 ||( $this ->bian1+ $this ->bian3) < $this ->bian2 ||( $this ->bian2+ $this ->bian3) < $this ->bian1) { $this ->error .= "三条边不能构成三角形" ; $bz = false; } return $bz ; } } ?>