How can I move a file to a dynamically determined name with bash?

I have a testprogram that writes some results into a file "result". I wanna run the program three times and then store the results in an appropriate file with the name result1, result2, etc.

I thought something along those lines will do the trick:

for ((  i = 0 ;  i <= 3;  i++  ))
do
  ./testprogram
  cp result result+'i'    (?????)
  rm res开发者_如何学编程ult
done

I am just not sure how I generate here the filename "result" + "i".

for i in {1..3}
do
  ./testprogram
  mv results "result${i}"
done

cp result result$i