fix argv/c checking

1 files changed, 6 insertions, 5 deletions

diff --git a/kmer_counts_per_sequence.c b/kmer_counts_per_sequence.c
index f725d5b..ac7ff44 100644
--- a/kmer_counts_per_sequence.c
+++ b/kmer_counts_per_sequence.c
@@ -20,6 +20,12 @@ int main(int argc, char **argv) {
 	size_t num_desired_indicies = 0;
 	size_t *desired_indicies = NULL;
 
+
+	if(argc < 3) {
+		printf("Please supply a filename and a kmer\n");
+		exit(EXIT_FAILURE);
+	}
+
 	unsigned long kmer = atoi(argv[2]);
 	if(kmer == 0) { 
 		fprintf(stderr, "Error: invalid kmer.\n");
@@ -28,11 +34,6 @@ int main(int argc, char **argv) {
 
 	const unsigned long long width = (unsigned long long)1 << (kmer * 2);
 
-	if(argc < 3) {
-		printf("Please supply a filename and a kmer\n");
-		exit(EXIT_FAILURE);
-	}
-
 	if(argc == 4) {
 		specific_mers = true;
 		desired_indicies = malloc((width) * sizeof(size_t));