You're welcome.
May I ask if you are a Danish citizen? If so, I don't think you would likely get any difficulty, as Denmark is a stable and highly developed country. Danish citizens are allowed to stay up to 180 days(6 months) visa free. Just be honest about your intentions, just tell them what you are here to do, visit a friend etc..they only flag people who appear to be nervous and act like their trying to hide something. Don't lie, be honest and open.
Showing Danish money will be fine since you can get it converted at a bank, also show them any credit cards (if you have any).
I think you're fine as long as you are a Danish citizen and have
1)Decent amount of money to support yourself for 3 months
2)Return ticket
3)Some kind of travel health insurance
4)If you have an invitation letter you can show that too, get it from a friend, relative etc..
5)Bring a bank account statement, showing you have a bank account at home.
Don't worry, you should be fine and I hope you enjoy your stay in Canada. Personally I think you will be stamped and let through, I don't think Danish citizens are really of concern to immigration Canada, probably the most low risk people.
