feat(grow): add grow method

hamster_tycoon/hamster.go

@@ -32,7 +32,7 @@ type Hamster struct {
 	Name              string
 	Number            int
 	Sexe              string
-	Age               int
+	Age               int // in days
 	Father            *Hamster
 	Mother            *Hamster
 	HungerLevel       int8
@@ -44,6 +44,7 @@ type Hamster struct {
 	Gestation         bool
 	GestationPeriod   int8
 	GestationCooldown int8
+	GestationFather   *Hamster
 	Child             []*Hamster
 }
 
@@ -51,6 +52,24 @@ func (h *Hamster) Die() {
 	h.Alive = false
 }
 
+func (h *Hamster) Grow() {
+	if h.Age >= MaxAge {
+		if randNumber(h.Age-MaxAge,365) > 364 {
+			h.Die()
+			return
+		}
+	}
+	h.Age++
+	if h.Gestation {
+		h.GestationPeriod++
+	} else {
+		if h.GestationCooldown > 0 {
+			h.GestationCooldown--
+		}
+	}
+	fmt.Println(h.GestationCooldown)
+}
+
 func (h *Hamster) Fuck(another *Hamster) (bool, error) {
 	if h.Sexe == another.Sexe {
 		return false, errors.New("can't fuck together")
@@ -63,13 +82,14 @@ func (h *Hamster) Fuck(another *Hamster) (bool, error) {
 	rand := randNumber(1, 100)
 
 	if rand <= GestationLuck {
-		female := func() *Hamster {
+		female,male := func() (*Hamster,*Hamster) {
 			if h.Sexe == FEMALE {
-				return h
+				return h,another
 			} else {
-				return another
+				return another,h
 			}
 		}()
+		female.GestationFather = male
 		female.Gestation = true
 		female.GestationPeriod = 0
 		female.GestationCooldown = TotalGestationPeriod + GestationCooldown
@@ -91,7 +111,7 @@ func Born(father *Hamster, mother *Hamster) ([]*Hamster, error) {
 
 	numberOfChild := randNumberChild()
 	child := make([]*Hamster, numberOfChild)
-	for i := 1; i <= numberOfChild; i++ {
+	for i := 0; i < numberOfChild; i++ {
 		child[i] = &Hamster{
 			Name:              fmt.Sprintf("Hamster %d", GlobalHamsterNumber),
 			Number:            GlobalHamsterNumber,