Added new case
@ -16,5 +16,7 @@ student@ubuntu:~/[[ROOT]]/printchessboard$ ./printchessboard 4 3 | cat -e
# # $
student@ubuntu:~/[[ROOT]]/printchessboard$ ./printchessboard 7 | cat -e
Error$
student@ubuntu:~/[[ROOT]]/printchessboard$ ./printchessboard 0 0 | cat -e
student@ubuntu:~/[[ROOT]]/printchessboard$
```