save project

diy1.py

@@ -6,5 +6,11 @@ while True:
     if a==username and b==userpassword:
         print("登陆成功")
         break
+    if a!=username:
+        print("账户错误")
+    if b!=userpassword:
+        print("密码错误")
+    if b!=userpassword and a!=username:
+        print("账户和密码错误")
     print('登陆失败')
 print('欢迎来到拼夕夕') 
\ No newline at end of file