1 files changed, 8 insertions, 0 deletions
diff --git a/src/card.c b/src/card.c
index 25db247..5132be6 100644
--- a/src/card.c
+++ b/src/card.c
@@ -1,6 +1,14 @@
 #include "card.h"
 #include <assert.h>
 
+/**
+ * Calculate the score of a single card
+ * Cards divisible by  5:            2 points
+ * Cards divisible by 10:            3 points
+ * Cards divisible by 11:            5 points
+ * Card 55 (divisible by 5 and 11):  7 points
+ * @return Score of the card
+ */
 uint32_t card_get_points(const card c)
 {
 	assert(c > 0 && c <= 105);