save project

diy1.py

@@ -7,4 +7,8 @@ while True:
     if a==username and b==userpassword:
         break
     print('输入错误')
+    if not name !=username:
+        print('账号错误')
+    if not name !=userpassword:
+        print('密码错误')
 print('欢迎来到贝尔编程')