save project

diy2.py

@@ -5,5 +5,10 @@ while True:
     password = input("请输入密码:")
     password = input("请输入密码:")
     if name == username and password == userpassword:
     if name == username and password == userpassword:
         print("登录成功!")
         print("登录成功!")
-    print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
+        break
+    if nema != username:
\ No newline at end of file
+        print("用户名不存在，请重新输入！")
+        continue
+    if password != userpassword:
+        print("密码输入有误，请重新输入！")
+print("欢迎来到贝尔编程!")