diff --git "a/\345\220\264\345\220\257\346\230\214/20220524-\345\255\246\347\224\237\344\277\241\346\201\257\347\256\241\347\220\206\347\263\273\347\273\237.md" "b/\345\220\264\345\220\257\346\230\214/20220524-\345\255\246\347\224\237\344\277\241\346\201\257\347\256\241\347\220\206\347\263\273\347\273\237.md"
new file mode 100644
index 0000000000000000000000000000000000000000..ef0d3bb5d9749b4ebeed75522fbda10b36428eb7
--- /dev/null
+++ "b/\345\220\264\345\220\257\346\230\214/20220524-\345\255\246\347\224\237\344\277\241\346\201\257\347\256\241\347\220\206\347\263\273\347\273\237.md"
@@ -0,0 +1,191 @@
+# 解答
+
+``` php
+
+//  一 学生信息管理系统
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/24
+ * Time: 16:36
+ */
+ include_once ('com.php');
+$sql ="select * from `user` order by stu_id";
+ $result=mysqli_query($con,$sql);
+?>
+<html>
+<head>
+    <meta charset ="utf-8">
+    <title>学生信息管理系统</title>
+<script>
+    function del() {
+   if (!window.confirm("确定要删除吗？")){
+       return false;
+   }
+    }
+</script>
+</head>
+<body>
+<h1>学生信息管理系统-登记表</h1>
+<table border="1" width="600">
+    <tr>
+        <th>学生编号</th>
+        <th>学生姓名</th>
+        <th>学生成绩</th>
+        <th>操作</th>
+    </tr>
+    <?php
+    if (!mysqli_num_rows($result)){
+        echo "<tr align='center'><td colspan='3'>暂无数据</td></tr>";
+    }else{
+    while ($row=mysqli_fetch_assoc($result)){
+    ?>
+    <tr align="center">
+        <td><?php echo $row['stu_id']?></td>
+        <td><?php echo $row['stu_name']?></td>
+        <td><?php echo $row['stu_score']?></td>
+        <td><a href="exitstu.php?stu_id=<?php echo $row['stu_id'] ?>">修改</a>|
+            <a href="deletestu.php?stu_id=<?php echo $row['stu_id'] ?>"onclick="return del(|);" >删除</a></td>
+    </tr>
+    <?php
+    }
+    }
+    ?>
+</table>
+<a href="addstu.php">添加信息</a>
+</body>
+</html>
+        
+        
+//  二 单独连接数据库
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/24
+ * Time: 17:12
+ */
+error_reporting(E_ALL^E_WARNING);
+ $con=mysqli_connect('127.0.0.1','root','root','student')
+ or die("连接失败".mysqli_error($con));
+mysqli_query($con,'set names utf8');
+
+// 三 添加信息
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/24
+ * Time: 17:20
+ */
+?>
+<html>
+<head>
+    <title>添加学生信息</title>
+
+</head>
+  <h1>添加学生信息</h1>
+ <form action="savestu.php" method="post">
+     <table border="1" width="300">
+         <tr>
+             <th>学生姓名</th><td><input type="text" name="stu_name"></td>
+         </tr>
+         <tr>
+             <th>学生成绩</th><td><input type="text" name="stu_score"></td>
+         </tr>
+         <tr>
+             <td colspan="2" align="center"><input type="submit" name="submit" value="提交"> &nbsp;&nbsp;&nbsp;<input type="reset" value="取消"></td>
+         </tr>
+     </table>
+     <a href="stu.php">返回</a>
+ </form>
+</html>
+                 
+// 四 
+
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Administrator
+ * Date: 2022/5/24
+ * Time: 17:32
+ */
+include_once ('com.php');
+if (!isset($_POST['submit'])){
+    die("非法访问");
+}
+
+$stu_name=$_POST['stu_name'];
+$stu_score=$_POST['stu_score'];
+
+$sql="insert into `user`(`stu_name`,`stu_score`) values('$stu_name','$stu_score')";
+$du=mysqli_query($con,$sql);
+if ($du){
+    echo "添加成功！<a href='stu.php'>返回信息表</a>";
+}else {
+    echo "添加失败";
+}
+
+
+//  五 修改信息
+<?php
+include_once ('com.php');
+if (!isset($_GET['stu_id'])){
+    die("非法访问！");
+}
+$stu_id=$_GET['stu_id'];
+$sql ="select * from `user` where `stu_id` = $stu_id";
+$result =mysqli_query($con,$sql);
+$row =mysqli_fetch_assoc($result);
+?>
+<html>
+<head>
+    <title>修改学生信息</title>
+
+</head>
+<h1>修改学生信息</h1>
+<form action="updatestu.php" method="post">
+    <table border="1" width="400">
+        <tr>
+            <th>学生姓名</th><td><input type="text" name="stu_name" value="<?php echo $row['stu_name'] ?>"></td>
+        </tr>
+        <tr>
+            <th>学生成绩</th><td><input type="text" name="stu_score" value="<?php echo $row['stu_score'] ?>"></td>
+        </tr>
+        <input type="text" name="stu_id" value="<?php echo $row['stu_id'] ?>" hidden>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name="submit" value="提交"> &nbsp;&nbsp;&nbsp;<input type="reset" value="取消"></td>
+        </tr>
+    </table>
+    <a href="stu.php">返回</a>
+                
+// 六
+<?php
+include_once ('com.php');
+if (!isset($_POST['submit'])){
+    die("非法访问！");
+}
+$stu_id=$_POST['stu_id'];
+$stu_name=$_POST['stu_name'];
+$stu_score=$_POST['stu_score'];
+$sql="update `user` set `stu_name`='$stu_name',`stu_score`='$stu_score' where `stu_id`='$stu_id'";
+$du=mysqli_query($con,$sql);
+if ($du){
+    echo "修改成功<a href='stu.php'>返回信息表</a>";
+}else{
+    echo "修改失败";
+}
+//  七 删除信息
+<?php
+include_once ('com.php');
+$stu_id=$_GET['stu_id'];
+$sql ="delete from `user`where `stu_id`='$stu_id'";
+$du = mysqli_query($con,$sql);
+if ($du){
+    echo "删除成功 <a href='stu.php'>返回首页</a>";
+}else{
+    echo "删除失败";
+}
+```
+
