PHP实现的简单三角形、矩形周长面积计算器分享

发布时间：2020-12-13 02:10:45 所属栏目：PHP教程来源：网络整理

导读：《PHP实例：PHP实现的简单三角形、矩形周长面积计算器分享》要点：本文介绍了PHP实例：PHP实现的简单三角形、矩形周长面积计算器分享，希望对您有用。如果有疑问，可以联系我们。运用PHP面向对象的知识设计一个图形计算器,同时也运用到了抽象类知识,这个计

《PHP实例：PHP实现的简单三角形、矩形周长面积计算器分享》要点：
本文介绍了PHP实例：PHP实现的简单三角形、矩形周长面积计算器分享，希望对您有用。如果有疑问，可以联系我们。

运用PHP面向对象的知识设计一个图形计算器,同时也运用到了抽象类知识,这个计算器可以计算三角形的周长和面积以及矩形的周长和面积.本图形计算器有4个页面：1.PHP图形计算器主页index.php;??? 2.形状的抽象类shape.class.php;??? 3三角形计算类triangle.class.php;??? 4.矩形计算类rect.class.php.

PHP图形计算器代码点击下载:?? php图形计算器.zip

代码分别如下：

PHP图形计算器主页：

<html>
????<head>
????????<title>简单的图形计算器</title>
????????<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
????</head>
?
????<body>
????????<center>
????????????<h1>简单的图形计算器</h1>
?
????????????<a href="index.php?action=rect">矩形</a> ||
????????????<a href="index.php?action=triangle">三角形</a> 
????????</center>
?
????????<hr><br>
?
????<?php
????????????error_reporting(E_ALL & ~E_NOTICE);
?
????????????//设置自动加载这个程序需要的类文件
????????????function __autoload($classname){
????????????????include strtolower($classname).".class.php";
????????????}
?
????????????//判断用户是否有选择单击一个形状链接
????????????if(!empty($_GET['action'])) {
????????????????//第一步：创建形状的对象
????????????????$classname = ucfirst($_GET['action']);
?
????????????????$shape=new $classname($_POST);
????????????????//第二步：调用形状的对象中的界面view()
????????????????$shape -> view();
?
????????????????//第三步：用户是否提交了对应图形界面的表单
????????????????if(isset($_POST['dosubmit'])) {
????????????????????//第四步：查看用户输出的数据是否正确,失败则提示
????????????????????if($shape->yan($_POST)) {
????????????????????????//计算图形的周长和面积
????????????????????????echo $shape->name."的周长为：".$shape->zhou()."<br>";
????????????????????????echo $shape->name."的面积为：".$shape->area()."<br>";
????????????????????}
????????????????}
?
????????????//如果用户没有单击链接,则是默认拜访这个主程序
????????????}else {
????????????????echo "请选择一个要计算的图形!<br>";
?
????????????}
?
?????????>
????</body>
</html>

形状的抽象类：

abstract class? Shape{
????//形状的名称
????public $name;
?
????//形状的计算面积办法
????abstract function area();
?
????//形状的计算周长的办法
????abstract function zhou();
?
????//形状的图形表单界面
????abstract function view();
????//形状的验证办法
????abstract function yan($arr);
?
}

三角形计算类文件：

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";
????}
?
????function area() {
????????$p =??? ($this->bian1 + $this->bian2 + $this->bian3)/2;
?
????????return sqrt($p*($p-$this->bian1)*($p-$this->bian2)*($p-$this->bian3));
????}
?
????function zhou() {
????????return $this->bian1 + $this->bian2 + $this->bian3;
????}
?
????function view() {
????????$form = '<form action="index.php?action=triangle" method="post">';
????????$form .= $this->name.'第一个边:<input type="text" name="bian1" value="'.$_POST['bian1'].'" /><br>';
????????$form .= $this->name.'第二个边:<input type="text" name="bian2" value="'.$_POST['bian2'].'" /><br>';
????????$form .= $this->name.'第三个边:<input type="text" name="bian3" value="'.$_POST['bian3'].'" /><br>';
????????$form .= '<input type="submit" name="dosubmit" value="计算"><br>';
????????$form .='<form>';
????????echo $form;
????}
?
????function yan($arr) {
????????$bj = true;
????????if($arr['bian1'] < 0) {
????????????echo "第一个边不能小于0!<br>";
????????????$bj = false;
????????}
?
????????if($arr['bian2'] < 0) {
????????????echo "第二个边不能小于0!<br>";
????????????$bj = false;
????????}
?
????????if($arr['bian3'] < 0) {
????????????echo "第三个边不能小于0!<br>";
????????????$bj = false;
????????}
?
????????if(($arr['bian1']+$arr['bian2'] < $arr['bian3']) || ($arr['bian1'] + $arr['bian3'] < $arr['bian2']) || ($arr['bian2']+$arr['bian3'] < $arr['bian1'])) {
????????????echo "两边之和必需大于第三个边";
????????????$bj = false;
????????}
?
????????return $bj; 
????}
}

矩形计算类文件：

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";
????}
?
????function area() {
????????return $this->width * $this->height;
????}
?
????function zhou() {
????????return 2*($this->width + $this->height);
????}
?
????function view() {
????????$form = '<form action="index.php?action=rect" method="post">';
????????$form .= $this->name.'的宽:<input type="text" name="width" value="'.$_POST['width'].'" /><br>';
????????$form .= $this->name.'的高:<input type="text" name="height" value="'.$_POST['height'].'" /><br>';
????????$form .= '<input type="submit" name="dosubmit" value="计算"><br>';
????????$form .='<form>';
????????echo $form;
????}
?
????function yan($arr) {
????????$bg = true;
????????if($arr['width'] < 0) {
????????????echo $this->name."的宽不克不及小于0!<br>";
????????????$bg = false;??? 
????????}
?
????????if($arr['height'] < 0) {
????????????echo $this->name."的高度不克不及小于0!<br>";
????????????$bg = false;
????????}
?
????????return $bg;
????}
?
}

《PHP实例：PHP实现的简单三角形、矩形周长面积计算器分享》是否对您有启发，欢迎查看更多与《PHP实例：PHP实现的简单三角形、矩形周长面积计算器分享》相关教程，学精学透。编程之家 52php.cn为您提供精彩教程。

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!