auto save

diy2.py

-username = "python"
-userpassword = "123456"
+i=3
+username = "sir"
+userpassword = "14514"
 while True:
 while True:
+    if i>0:
         name = input("请输入用户名:")
         name = input("请输入用户名:")
         password = input("请输入密码:")
         password = input("请输入密码:")
-    if name == username and password == userpassword:
+        i-=1
+        if username == name 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 username != name:
\ No newline at end of file
+            print("没了")
+            continue
+        if password != userpassword:
+            print("没了") 
+    else:
+        print("奶奶滴")
+        exit()
+print("欢迎来到yy!")
\ No newline at end of file