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Able to read input

Piotr Czajkowski há 2 meses atrás
pai
commit
2db28af1e4
1 ficheiros alterados com 45 adições e 0 exclusões
  1. 45 0
      22/code.go

+ 45 - 0
22/code.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+)
+
+func readInput(file *os.File) []int {
+	scanner := bufio.NewScanner(file)
+	var numbers []int
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == "" {
+			break
+		}
+
+		number, err := strconv.Atoi(line)
+		if err != nil {
+			log.Fatalf("Can't parse a number %s: %s", line, err)
+		}
+
+		numbers = append(numbers, number)
+	}
+
+	return numbers
+}
+
+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)
+	}
+
+	numbers := readInput(file)
+	fmt.Println(numbers)
+}