65 lines
1.1 KiB
Go
65 lines
1.1 KiB
Go
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package main
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import (
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"bufio"
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"fmt"
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"os"
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"strconv"
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"strings"
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)
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func main() {
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content := returnContent("../input")
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horizontal, depth, _ := followGuidance(content)
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fmt.Println(horizontal * depth)
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}
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func returnContent(path string) *[]string {
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//read file and return it as an array of integers
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file, err := os.Open(path)
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var content []string
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if err != nil {
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fmt.Println("Unlucky, the file didn't open")
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return &content
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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content = append(content, scanner.Text())
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}
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return &content
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}
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func followGuidance(content *[]string) (horizontal int, depth int, aim int) {
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for i := 0; i < len(*content); i++ {
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currentLine := strings.Split((*content)[i], " ")
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value, err := strconv.Atoi(currentLine[1])
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if err != nil {
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fmt.Println("Uh oh, couldn't find the key! There was an issue with the sonar")
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}
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switch currentLine[0] {
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//instructions say that up and down are reversed as we are in the submarine
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case "up":
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aim -= value
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case "down":
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aim += value
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default:
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horizontal += value
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depth += aim * value
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}
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}
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return
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}
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