how to reduce offset voltage

[MAnsa.1]

Hiii,i am using STM8s003f3 controller. i am trying to measure DC voltage but got some offset error on display and because of this error i am not getting 0000 value on display when there is no input is connected.how can get rid of this error in C,is there any way or calculation????????????

Thanks

[Cristian Gyorgy]

With what you wrote, I don't think anyone can understand your issue, so you should not expect great help...

Good luck!