Day 18 solution

eighteen/main.go

@@ -0,0 +1,26 @@
+package eighteen
+
+import "fmt"
+
+type Eighteen struct {
+	snail snail
+}
+
+func Init(filepath string) *Eighteen {
+	eighteen := &Eighteen{
+		snail: snail{},
+	}
+
+	eighteen.snail.load(filepath)
+	return eighteen
+}
+
+func (d *Eighteen) Answer() string {
+	sum := d.snail.sum()
+
+	return fmt.Sprintf("The magnitude of the final sum is %d", sum.magnitude())
+}
+
+func (d *Eighteen) FollowUp() string {
+	return fmt.Sprintf("The largest magnitude of any two snail numbers is %d", d.snail.largestMagnitude())
+}