save project

diy1.py

@@ -6,10 +6,9 @@ while True:
     if a== username and s==userpassword:
         print("登陆成功") 
         break
-    if a!=username:  
+    elif a!=username:  
             print("账号错误")
-        continue   
-    if s!=userpassword :
+    else :
             print("密码错误")
 print("欢迎")