这一段程序毛病在哪儿
这一段程序毛病在哪里
//这是一段计算器的代码
//接受用户从mycal.php输入的数据
$num1=$_REQUEST['num1'];
$num2=$_REQUEST['num2'];
$oper=$_REQUEST['oper'];//$_REQUEST方法可以接受用户的post或者get请求的数据
$res=0;
switch (oper){
case"+":$res=$num1+$num2;
break;
case"-":$res=$num1-$num2;
break;
case"*":$res=$num1*$num2;
break;
case"/":$res=$num1/$num2;
break;
default:echo "运算符不准确";
}
echo "运算结果是：".$res;
?>
结果不论输入什么数字和运算符，结果都是“运算符不准确运算结果是：0”
------解决方案--------------------
Miss $
//接受用户从mycal.php输入的数据
$num1=$_REQUEST['num1'];
$num2=$_REQUEST['num2'];
$oper=$_REQUEST['oper'];//$_REQUEST方法可以接受用户的post或者get请求的数据
$res=0;
switch ($oper){
case"+":$res=$num1+$num2;
break;
case"-":$res=$num1-$num2;
break;
case"*":$res=$num1*$num2;
break;
case"/":$res=$num1/$num2;
break;
default:echo "运算符不准确";
}
echo "运算结果是：".$res;
------解决方案--------------------
switch ($oper){
------解决方案--------------------
楼上都是正解。。
------解决方案--------------------
------解决方案--------------------
++
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
What does php request mean?
Jul 07, 2021 pm 01:49 PM
The Chinese meaning of request is "request". It is a global variable in PHP and is an array containing "$_POST", "$_GET" and "$_COOKIE". The "$_REQUEST" variable can obtain data and COOKIE information submitted by POST or GET.
What is the Request object in PHP?
Feb 27, 2024 pm 09:06 PM
The Request object in PHP is an object used to handle HTTP requests sent by the client to the server. Through the Request object, we can obtain the client's request information, such as request method, request header information, request parameters, etc., so as to process and respond to the request. In PHP, you can use global variables such as $_REQUEST, $_GET, $_POST, etc. to obtain requested information, but these variables are not objects, but arrays. In order to process request information more flexibly and conveniently, you can
How to use the urllib.request.urlopen() function to send a GET request in Python 3.x
Jul 30, 2023 am 11:28 AM
How to use the urllib.request.urlopen() function in Python3.x to send a GET request. In network programming, we often need to obtain data from a remote server by sending an HTTP request. In Python, we can use the urllib.request.urlopen() function in the urllib module to send an HTTP request and get the response returned by the server. This article will introduce how to use
The role and significance of Request in PHP
Feb 27, 2024 pm 12:54 PM
The role and significance of Request in PHP In PHP programming, Request is a mechanism for sending requests to the Web server. It plays a vital role in Web development. Request is mainly used to obtain data sent by the client, such as form submission, GET or POST request, etc. Through Request, the data input by the user can be obtained, and the data can be processed and responded to. This article will introduce the role and significance of Request in PHP and give specific code examples.
How to encapsulate Vue3 Axios interceptor into request file
May 19, 2023 am 11:49 AM
1. Create a new file called request.js and import Axios: importaxiosfrom'axios'; 2. Create a function called request and export it: This will create a function called request and export it Set up a new Axios instance with a base URL. To add timeout settings in a wrapped Axios instance, you can pass the timeout option when creating the Axios instance. exportconstrequest=axios.create({baseURL:'https://example.
php提交表单通过后,弹出的对话框怎样在当前页弹出,该如何解决
Jun 13, 2016 am 10:23 AM
php提交表单通过后,弹出的对话框怎样在当前页弹出php提交表单通过后,弹出的对话框怎样在当前页弹出而不是在空白页弹出？想实现这样的效果：而不是空白页弹出:------解决方案--------------------如果你的验证用PHP在后端，那么就用Ajax；仅供参考：HTML code
What is request in PHP
Jun 01, 2023 am 10:12 AM
Request in PHP refers to request. It is a super global variable in PHP. It is used to collect data submitted by HTML forms and parameters in URLs. It can obtain data from GET and POST requests at the same time. Note that $_request is an associative array. , where the keys are the names of the form fields and the values are the values of the form fields. When using the $_request variable, user-entered data should always be validated and filtered to avoid security issues.
How to use context to implement request parameter verification in Go
Jul 22, 2023 am 08:23 AM
How to use context to implement request parameter verification in Go Introduction: During the back-end development process, we often need to verify the request parameters to ensure the legality of the parameters. The Go language provides the context package to handle request context information. Its elegant design and simple use make it a commonly used tool. This article will introduce how to use Go's context package to implement request parameter verification and give corresponding code examples. Introduction to the context package In Go, the context package is used to deliver
