时间:2021-07-01 10:21:17 帮助过:14人阅读
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:
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()."
- <title>简单的图形计算器</title>
- <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
- <center>
- <h2>简单的图形计算器</h2>
- 矩形 ||
- 三角形
- </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
形状的抽象类:
- abstract class Shape{
- //形状的名称
- public $name;
- //形状的计算面积方法
- abstract function area();
- //形状的计算周长的方法
- abstract function zhou();
- //形状的图形表单界面
- abstract function view();
- //形状的验证方法
- abstract function yan($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 .='';
- 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 "两边之和必须大于第三个边";
- $bj = false;
- }
- return $bj;
- }
- }</form>
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 .= $this->name.'的宽:<input type="text" name="width" value="'.$_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 .='';
- echo $form;
- }
- function yan($arr) {
- $bg = true;
- if($arr['width'] < 0) {
- echo $this->name."的宽不能小于0!<br>";
- $bg = false;
- }
- if($arr['height'] < 0) {
- echo $this->name."的高度不能小于0!<br>";
- $bg = false;
- }
- return $bg;
- }
- }