Able to read input

21/code.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func readInput(file string) (int, int) {
+	content, err := ioutil.ReadFile(file)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	lines := strings.Split(string(content), "\n")
+	if len(lines) != 2 {
+		log.Fatal("expected 2 lines")
+	}
+
+	partsFirstLine := strings.Split(lines[0], ": ")
+	if len(partsFirstLine) != 2 {
+		log.Fatal("expected 2 parts")
+	}
+
+	player1, err := strconv.Atoi(partsFirstLine[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	partsSecondLine := strings.Split(lines[1], ": ")
+	if len(partsSecondLine) != 2 {
+		log.Fatal("expected 2 parts")
+	}
+
+	player2, err := strconv.Atoi(partsSecondLine[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	return player1, player2
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		log.Fatal("Please provide a file name as argument")
+	}
+
+	player1, player2 := readInput(os.Args[1])
+	fmt.Println(player1, player2)
+}

21/testinput

@@ -0,0 +1,2 @@
+Player 1 starting position: 4
+Player 2 starting position: 8