save project

diy1.py

@@ -7,9 +7,13 @@ while True:
     if a==username and b==userpassword:
         print("登陆成功")
         break
-    if a!=username:
-        print("户名错误,请重新输入")
+    else:
         
-    if b!=userpassword:
-        print("密码错误,请重新输入")
+        if a!=username:
+            print("户名错误,请重新输入")
+        elif  :
+        
+        
+        if b!=userpassword:
+            print("密码错误,请重新输入")
 print("欢迎来到贝尔编程")
\ No newline at end of file