save project

diy2.py

+username = "我是单身狗"
+userpassword = "2013416"
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
+    
+    if name != username:
+        print("户名不对")
+        continue
+    if password != userpassword:
+        print("密码不对")
+        
+
+
+
+print("欢迎来到豆丁!")
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