auto save

diy2.py

-# username = "python"
-# 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!")
-#         break
-#     print("用户名和密码错误!请重新输入")
-# print("欢迎来到贝尔编程!")
+username = "python"
+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!")
+        break
+    if name != username:
+        print("请输入正确账号")
+        continue
+    if password != userpassword:
+        print("请输入正确密码")
+    print("用户名和密码错误!请重新输入")
+print("欢迎来到贝尔编程!")
 
 #使用for循环在[0,100]这个区间内每隔3个数值生成，当数值大于72时跳出循环
 for i in range(0,30,3):