If i travel to America with a US visa do i have to get a canadian visa to enter canada?

I am an indian.

they make you have a passport to enter into canada now.

Yes. Canadian customs doesn't care if you have an American visa or not, to get into Canada you need a Canadian visa. And citizens of India do need a visa to enter.

Yes you need to have a Canadian visa to enter Canada....you should go to the Canadian Embassy and/or Consulate to obtain the appropriate visa before leaving the country where you live

Yes you would need a canadian visa .A US visa means nothing to Canada .Just like a canadian visa means nothing to the USA as they are both Different countries !!!!
You will need just to apply for your canadian visa in India before travelling abroad(country of origin )

America has nothing to do with the US
a US visa is worthless in Canada unless it is a green card it will not allow you to enter Canada

if you are talking about a tourist visa you will need to apply for one to enter Canada