diff --git "a/\350\203\241\346\242\246\347\217\202/20220524_\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237.md" "b/\350\203\241\346\242\246\347\217\202/20220524_\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237.md"
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index 0000000000000000000000000000000000000000..5e99f4915a374f65c5b5758a9940d3cebaa5b926
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+++ "b/\350\203\241\346\242\246\347\217\202/20220524_\345\255\246\347\224\237\347\256\241\347\220\206\347\263\273\347\273\237.md"
@@ -0,0 +1,196 @@
+#  作业
+
+
+
+
+
+```php
+<?php
+error_reporting(E_ALL ^ E_WARNING);
+
+$conn =mysqli_connect('localhost','root','123456','student') or die("连接失败").mysqli_error($conn);
+
+mysqli_query($conn,'set names utf8');
+```
+
+
+
+```php+HTML
+<?php
+include_once('conn.php');
+$sql = "select * from `user` order by id";
+$result = mysqli_query($conn, $sql);
+?>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>学生成绩系统</title>
+
+</head>
+<body>
+<h1>成绩管理系统-——首页</h1>
+<table border="1" width="600">
+    <tr>
+        <th>学生编号</th>
+        <th>学生姓名</th>
+        <th>学生成绩</th>
+        <th>操作</th>
+    </tr>
+    <?php
+    if (!mysqli_num_rows($result)) {
+        echo "<tr align='center'><td colspan='5'>没有数据！</td></tr>";
+    } else {
+        while ($row = mysqli_fetch_assoc($result)) {
+            ?>
+            <tr align="center">
+                <td><?php echo $row['id'] ?></td>
+                <td><?php echo $row['name'] ?></td>
+                <td><?php echo $row['score'] ?></td>
+
+                <td><a href="edit.php?id=<?php echo $row['id'] ?>">修改</a>|
+                    <a href="delete.php?id=<?php echo $row['id'] ?>">删除</a></td>
+            </tr>
+            <?php
+        }
+    }
+    ?>
+</table>
+<a href=" add.php">添加学生</a>
+</body>
+</html>
+
+```
+
+```html
+<html>
+<head>
+    <title>添加成绩</title>
+
+</head>
+<h1>添加成绩</h1>
+<form action="save.php" method="post">
+    <table border="1" width="300">
+        <tr>
+            <th>学生姓名</th><td><input type="text" name="name"></td>
+        </tr>
+        <tr>
+            <th>学生成绩</th><td><input type="text" name="score"></td>
+        </tr>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="提交">&nbsp;&nbsp;&nbsp;&nbsp;
+                <input type="reset" value="取消"></td>
+        </tr>
+    </table>
+    <a href="index.php">返回首页</a>
+
+</form>
+</html>
+
+```
+
+```php+HTML
+<?php
+include_once('conn.php');
+if(!isset($_POST['submit'])){
+    die("非法访问！");
+}
+
+$name=$_POST['name'];
+$score = $_POST['score'];
+
+$sql = "insert into `user` (name,score) values ('$name',$score)";
+//echo $sql;
+
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "添加成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "添加失败！";
+}
+```
+
+
+
+```php+HTML
+<?php
+include_once("./conn.php");
+if (!isset($_GET['id'])) {
+    die("你想干嘛！");
+}
+$id = $_GET['id'];
+
+$sql = "select * from `user` where `id`=$id";
+$result = mysqli_query($conn, $sql);
+$row = mysqli_fetch_assoc($result);
+?>
+<html>
+<head>
+    <title>修改学生成绩</title>
+
+</head>
+<h1>修改信息</h1>
+<form action="update.php" method="post">
+    <table border="1" width="300">
+
+        <tr>
+            <th>学生姓名</th>
+            <td><input type="text" name="name" value="<?php echo $row['name'] ?>"></td>
+        </tr>
+        <tr>
+            <th>学生成绩</th>
+            <td><input type="text" name="score" value="<?php echo $row['score'] ?>"></td>
+        </tr>
+        <input type="text" name="id" value="<?php echo $row['id'] ?>" hidden>
+        <tr>
+            <td colspan="2" align="center"><input type="submit" name='submit' value="提交">&nbsp;&nbsp;&nbsp;&nbsp;
+                <input type="reset" value="取消"></td>
+
+        </tr>
+    </table>
+    <a href="index.php">返回首页</a>
+
+</form>
+</html>
+
+```
+
+```php+HTML
+<?php
+
+include_once('conn.php');
+
+if(!isset($_POST['submit'])){
+    die("你想干嘛！");
+}
+$id=$_POST['id'];
+$name=$_POST['name'];
+$score=$_POST['score'];
+
+
+
+$sql = "update `user` set `name`='$name',`score`=$score where id=$id ";
+//echo $sql;
+
+$ret = mysqli_query($conn,$sql);
+if($ret){
+    echo "修改成功！<a href='./index.php'>返回首页</a>";
+}else{
+    echo "修改失败！";
+}
+```
+
+```php+HTML
+<?php
+include_once('conn.php');
+$id = $_GET['id'];
+
+$sql = "delete from `user` where id=$id";
+//echo $sql;
+
+$ret = mysqli_query($conn, $sql);
+if ($ret) {
+    echo "删除成功！<a href='./index.php'>返回首页</a>";
+} else {
+    echo "删除失败！";
+}
+```
\ No newline at end of file
