save project

diy2.py

@@ -6,9 +6,8 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    if name != username:
-        print("用户名不存在!")
-        continue    
-    if password != userpassword:
-        print("密码不存在!")        
+    elif name != username:
+        print("用户名不存在!") 
+    else:
+        print("密码不存在!")      
 print("欢迎来到贝尔编程!")
\ No newline at end of file