PHP实现简易图形计算器

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

 

 

  
简易图形计算器
 矩形 |
 三角形|
 圆形 
 

 
 view($_POST);
 
  if (isset($_POST['sub'])) {
  echo "
";
  if ($shape->yan($_POST)) {
   
   echo "".$shape->name."的周长".$shape->zhou().""."
";
   echo "
";
   echo "".$shape->name."的面积".$shape->area().""."
";
  }else {
   echo "错误：$shape->error";
  }
  echo "
";
  }
  
 } else {
  echo "请选择一个图形";
 }
 
 ?>
 
 

先定义一个抽象类

矩形类的编写

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 .= "
";
  $form .= "请输入".$arr['name']."的宽度：
";
  $form .= "
";
  $form .= "请输入".$arr['name']."的长度：
";
  $form .= "
";
  $form .= "  ";
  $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：

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 .= "
";
  $form .= "请输入".$arr['name']."的第一条边：
";
  $form .= "
";
  $form .= "请输入".$arr['name']."的第二条边：
";
  $form .= "
";
  $form .= "请输入".$arr['name']."的第三条边：
";
  $form .= "
";
  $form .= "  ";
  $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;
 }
 }
?>

其他的类只要按照上面的格式改下就很好写出来了。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。