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diff --git a/第19讲王者荣耀化妆舞会/课堂成果/images/钟馗.png b/第19讲王者荣耀化妆舞会/课堂成果/images/钟馗.png
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diff --git a/第19讲王者荣耀化妆舞会/课堂成果/角色切换.py b/第19讲王者荣耀化妆舞会/课堂成果/角色切换.py
new file mode 100644
index 0000000..8551ee7
--- /dev/null
+++ b/第19讲王者荣耀化妆舞会/课堂成果/角色切换.py
@@ -0,0 +1,104 @@
+import tkinter as tk
+from PIL import Image, ImageTk
+
+# 角色数据
+characters = [
+    {
+        "name": "铠",
+        "quote": "",
+        "image": "images/凯.png"
+    },
+    {
+        "name": "李白",
+        "quote": "",
+        "image": "images/李白.png"
+    },
+    {
+        "name": "甄姬",
+        "quote": "",
+        "image": "images/甄姬.png"
+    },
+    {
+        "name": "百里守约",
+        "quote": "",
+        "image": "images/百里守约.png"
+    },
+    {
+        "name": "钟馗",
+        "quote": "",
+        "image": "images/钟馗.png"
+    }
+]
+
+# 图片等比缩放
+def resize_image_keep_aspect(image, max_width=300, max_height=360):
+    ratio = min(max_width / image.width, max_height / image.height)
+    new_size = (int(image.width * ratio), int(image.height * ratio))
+    return image.resize(new_size, Image.Resampling.LANCZOS)
+
+class RoleSwitcherApp:
+    def __init__(self, master):
+        self.master = master
+        self.master.title("角色切换器")
+        self.master.geometry("420x600")         # 固定窗口大小
+        self.master.resizable(False, False)     # 禁止缩放
+        self.index = 0
+
+        # 图片区域
+        self.image_label = tk.Label(master)
+        self.image_label.pack(pady=10)
+
+        # 名字
+        self.name_label = tk.Label(master, text="", font=("Arial", 16))
+        self.name_label.pack()
+
+        # 对话框区域
+        self.dialog_frame = tk.Frame(master, bg="#f0f0f0", padx=10, pady=10)
+        self.dialog_frame.pack(padx=10, pady=10, fill="x")
+
+        self.quote_label = tk.Label(
+            self.dialog_frame,
+            text="",
+            font=("微软雅黑", 13),
+            wraplength=400,
+            justify="left",
+            anchor="w"
+        )
+        self.quote_label.pack()
+
+        # 按钮区域
+        btn_frame = tk.Frame(master)
+        btn_frame.pack(pady=10)
+
+        tk.Button(btn_frame, text="← 上一个", command=self.prev_character).pack(side="left", padx=20)
+        tk.Button(btn_frame, text="下一个 →", command=self.next_character).pack(side="left", padx=20)
+
+        # 键盘控制
+        master.bind("<Left>", lambda event: self.prev_character())
+        master.bind("<Right>", lambda event: self.next_character())
+
+        self.update_display()
+
+    def update_display(self):
+        char = characters[self.index]
+        self.name_label.config(text=f"角色：{char['name']}")
+
+        image = Image.open(char["image"])
+        image = resize_image_keep_aspect(image)
+        self.tk_image = ImageTk.PhotoImage(image)
+        self.image_label.config(image=self.tk_image)
+
+        self.quote_label.config(text=f"“{char['quote']}”")
+
+    def next_character(self):
+        self.index = (self.index + 1) % len(characters)
+        self.update_display()
+
+    def prev_character(self):
+        self.index = (self.index - 1) % len(characters)
+        self.update_display()
+
+if __name__ == "__main__":
+    root = tk.Tk()
+    app = RoleSwitcherApp(root)
+    root.mainloop()
diff --git a/第42讲抽奖系统/课堂成果/base.py b/第42讲抽奖系统/课堂成果/base.py
new file mode 100644
index 0000000..226e3ad
--- /dev/null
+++ b/第42讲抽奖系统/课堂成果/base.py
@@ -0,0 +1,24 @@
+import random
+import os
+import time
+
+list=["特等奖","一等奖","二等奖","三等奖","安慰奖"]
+
+for i in range(20):
+    print(random.choice(list))
+    time.sleep(0.1)
+    os.system('cls')
+
+re=random.randint(1,100)
+if re <= 1:
+    print("恭喜特等奖")
+elif re <= 5:
+    print("恭喜一等奖")
+elif re<= 10:
+    print("恭喜二等奖")
+elif re <= 20:
+    print("恭喜三等奖")
+else:
+    print("恭喜安慰奖")
+
+os.system('pause')
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