Able to read input

19/code.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+)
+
+type blueprint struct {
+	id           int
+	oreCost      int
+	clayCost     int
+	obsidianCost [2]int
+	geodeCost    [2]int
+}
+
+func readInput(file *os.File) []blueprint {
+	scanner := bufio.NewScanner(file)
+	var blueprints []blueprint
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == "" {
+			continue
+		}
+
+		var current blueprint
+		n, err := fmt.Sscanf(line, "Blueprint %d: Each ore robot costs %d ore. Each clay robot costs %d ore. Each obsidian robot costs %d ore and %d clay. Each geode robot costs %d ore and %d obsidian.", &current.id, &current.oreCost, &current.clayCost, &current.obsidianCost[0], &current.obsidianCost[1], &current.geodeCost[0], &current.geodeCost[1])
+		if n != 7 || err != nil {
+			log.Fatal("Can't parse:", line, err)
+		}
+
+		blueprints = append(blueprints, current)
+	}
+
+	return blueprints
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		log.Fatal("You need to specify a file!")
+	}
+
+	filePath := os.Args[1]
+	file, err := os.Open(filePath)
+	if err != nil {
+		log.Fatalf("Failed to open %s!\n", filePath)
+
+	}
+
+	blueprints := readInput(file)
+	fmt.Println(blueprints)
+}