save project

diy2.py

@@ -6,4 +6,8 @@ while True:
     if username==name and userpassword==password:    
     if username==name and userpassword==password:    
         print("登陆成功")
         print("登陆成功")
         break
         break
-    print("用户名和密码错误请重新输入")
+    if username != name:
\ No newline at end of file
+        print("用户名不存在")
+        continue
+    if userpassword != password:
+        print("密码错误 请重新输入")
\ No newline at end of file