diff options
-rwxr-xr-x | src/wheel-gen.pl | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/wheel-gen.pl b/src/wheel-gen.pl index 27b952219..be03a6e3b 100755 --- a/src/wheel-gen.pl +++ b/src/wheel-gen.pl @@ -40,6 +40,9 @@ sub is_prime ($) } { + @ARGV == 1 + or die "$program_name: missing argument\n"; + my $wheel_size = $ARGV[0]; my @primes = (2); |