auto save

diy.py

-if name==username and password==userpassword:
-    print("正确")
-elif name !=username:
-    
\ No newline at end of file
+username="python"
+userpassward="123456"
+while True:
+    name=input("用户名")
+    passward=input("用户密码")
+    if name==username and password==userpassword:
+        print("正确")
+        break()
+    if name!=username:
+        print("名字错了")
+    if passward!=userpassward:
+        print("密码错了")
+print("欢迎来到贝尔编程")
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