save project

diy2.py

-username = "python"
-userpassword = "123456"
+username ="qwer"
+userpassword = "12345"
 while True:
 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!")
-    print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
+    name = input("请输入账号")
+    password = input("请输入密码") 
+    if username == name and userpassword == password:
+        print("登录成功")
+        break
+    if name != username:
\ No newline at end of file
+        print("用户名不存在,请重新输入")
+    if userpassword != password:
+        print("密码错误,请重新输入")
+    print("输入错误,请重新输入")
+print("欢迎来到应用")