Caught my son smoking, how to talk to him?

I know because he's always eating mints and his clothes stank of cigarettes... I'm not a good example because I smoke a cigarette before bed but I'm not happy he's doing this.

I don't want to punish him or get angry, but I want to tell him is not good and I too want to quit, what should I say to him?

I'm not angry but this makes me, I keep thinking I gave him the wrong example

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Thanks to everyone who gave me answers and advice. I have talked to him, I didn't get mad or raise my voice, I told him I am upset and concerned I'm giving a bad example... We made a deal he will smoke ONE cigarette with me after dinner, no more than that and we will both try to quit.
Caught my son smoking, how to talk to him?
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