1.3 KiB
Grains
Write a program that calculates the number of grains of wheat on a chessboard given that the number on each square doubles.
There once was a wise servant who saved the life of a prince. The king promised to pay whatever the servant could dream up. Knowing that the king loved chess, the servant told the king he would like to have grains of wheat. One grain on the first square of a chess board. Two grains on the next. Four on the third, and so on.
There are 64 squares on a chessboard.
Write a program that shows:
- how many grains were on each square, and
- the total number of grains
For bonus points
Did you get the tests passing and the code clean? If you want to, these are some additional things you could try:
- Optimize for speed.
- Optimize for readability.
Then please share your thoughts in a comment on the submission. Did this experiment make the code better? Worse? Did you learn anything from it?
To run the tests simply run the command go test in the exercise directory.
If the test suite contains benchmarks, you can run these with the -bench
flag:
go test -bench .
For more detailed info about the Go track see the help page.
Source
JavaRanch Cattle Drive, exercise 6 view source