First of all, I wish you best with this situation. As a nurse, I see this every day.
Unfortunately, you cannot MAKE your Dad stop smoking
. But you can ask your dad to stop smoking. Simply tell him that you love him and that you're so glad he got a second chance at life after his surgery and that you simply don't want to lose him. Explain that you know that smoking is something he CAN control (unlike a heart attack
or cancer) and that you simply have one wish....and that it is for him to please consider his family (esp. grandchildren he may or may not have yet) when he thinks about lighting up again. Every cigarette he doesn't light up adds days and weeks to his life. Remind him of how easy it was for him to quit the first time and that it will be just as easy the second time. And that he will have your support the whole way, no matter what it takes.
You MUST REMEMBER, though to keep calm. If he sees you upset and mad and yelling, he will get defensive and tune you out.
I hope you have the kind of relationship with your dad that you can do this. Otherwise it will be HARD, but it must be done if you are to have him around much longer.
Again, I wish you ALL THE BEST and I know that it will be hard, but you can do it because you want him around and I can tell you love him.......