54 lines
805 B
Go
54 lines
805 B
Go
package main
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import (
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"bufio"
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"fmt"
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"log"
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"os"
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"strings"
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"strconv"
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)
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var vertical int = 0
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var horizontal int = 0
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func checkErr(e error){
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if e != nil{
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log.Fatal(e)
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panic(e)
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}
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}
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func main(){
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f, err:=os.Open("input")
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checkErr(err)
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defer f.Close()
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scanner := bufio.NewScanner(f)
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for scanner.Scan(){
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evalCommand(scanner.Text())
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}
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fmt.Println(horizontal*vertical)
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}
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func evalCommand(c string){
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s := strings.Split(c," ")
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switch s[0]{
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case "forward":
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s,err := strconv.Atoi(s[1])
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checkErr(err)
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horizontal = horizontal+s
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case "backward":
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s,err := strconv.Atoi(s[1])
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checkErr(err)
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horizontal = horizontal-s
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case "up":
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s,err := strconv.Atoi(s[1])
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checkErr(err)
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vertical=vertical-s
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case "down":
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s,err := strconv.Atoi(s[1])
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checkErr(err)
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vertical=vertical+s
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}
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}
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