structs get *not* handed over do funcs as references (good!)

day22/day.go

@@ -1,6 +1,7 @@
 package day22
 
 import (
+	"fmt"
 	"strconv"
 	"strings"
 	"tools"
@@ -36,15 +37,19 @@ func (e Entity) copy() Entity {
 	return Entity{e.hitpoints, e.mana, e.damage, e.armor, e.currentEffects}
 }
 
+func (e Entity) printStats() {
+	fmt.Println("HP:", e.hitpoints, "Mana:", e.mana, "Damage:", e.damage, "Armor:", e.armor)
+}
+
 var spells = map[string]Spell{
-	"Magic Missile": {53, 4, 0, nil},
+	"Magic Missile": {53, 4, 0, Effect{}},
-	"Drain":         {73, 2, 2, nil},
+	"Drain":         {73, 2, 2, Effect{}},
 	"Shield":        {113, 0, 0, Effect{0, 7, 0, 6}},
 	"Poison":        {173, 0, 0, Effect{3, 0, 0, 6}},
 	"Recharge":      {229, 0, 0, Effect{0, 0, 101, 5}},
 }
 
-func applyEffects(player, boss Entity) {
+func applyEffects(player, boss *Entity) {
 	for eName, eData := range player.currentEffects {
 		switch eName {
 		case "Shield":
@@ -67,7 +72,7 @@ func applyEffects(player, boss Entity) {
 	}
 }
 
-func fightRound(player, boss Entity, spell Spell) (outcome int) {
+func fightRound(player, boss *Entity, spell Spell) (outcome int) {
 	// outcome will be -1 on boss win, 0 on both living and 1 on player win
 
 	applyEffects(player, boss)
@@ -102,9 +107,15 @@ func Part1(puzzle tools.AoCPuzzle) interface{} {
 		case "Hit Points":
 			boss.hitpoints, _ = strconv.Atoi(parts[1])
 		case "Damage":
-			boss.damage, _ = strconv.Atoi(parts[0])
+			boss.damage, _ = strconv.Atoi(parts[1])
 		}
 	}
+	player.printStats()
+	boss.printStats()
+	fightRound(&player, &boss, spells["Magic Missile"])
+	player.printStats()
+	boss.printStats()
+
 	return 0
 }
 

inputs/22

@@ -0,0 +1,2 @@
+Hit Points: 55
+Damage: 8

inputs/22_test

@@ -0,0 +1,2 @@
+Hit Points: 55
+Damage: 8