My dog has worms! What kind are they and what to do?

i agree with everyone else bout the types and going to the vet my 3yr old when she was baby the ppl i got her from said she was dewormed with stuff they got at a store she wouldnt eat right and her poo was runny so i figured she still had worms the night before i was gonna take her to doc she pooped out a roundworm longer then her!!! i got dewormer from the vet and cleared it right up good luck