auto save

diy2.py

-username = "python"
-userpassword = "123456"
+i=3
+username = "python"    # 保存在服务器数据库中的用户账号（正确的账号）
+userpassword = "123456" 
 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!")
\ No newline at end of file
+    if i>0:
+        name = input("请输入帐号：")
+        password=input("请输入密码：")
+        i-=1
+        if name==username and password==userpassword:
+            print("登陆成功")
+            break
+        if name != userpassword:
+            print("请重新输入") 
+            continue   
+        if password != userpassword:
+            print("请重新输入")  
+    else:
+        print("请滚")
+print("欢迎")            
\ No newline at end of file