Day 8 solution

eight/main.go

@@ -0,0 +1,26 @@
+package eight
+
+import "fmt"
+
+type Eight struct {
+	display display
+}
+
+func Init(filepath string) *Eight {
+	eight := &Eight{
+		display: display{},
+	}
+
+	eight.display.load(filepath)
+	return eight
+}
+
+func (d *Eight) Answer() string {
+	count := d.display.uniqueOuputs()
+	return fmt.Sprintf("There were %d instances of digits 1, 4, 7, or 8", count)
+}
+
+func (d *Eight) FollowUp() string {
+	outputSum := d.display.outputSum()
+	return fmt.Sprintf("The sum of the decoded output values was %d", outputSum)
+}