✨ Finish task for part one for day 2
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1
day2/input.txt
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1
day2/input.txt
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1,0,0,3,1,1,2,3,1,3,4,3,1,5,0,3,2,1,13,19,1,9,19,23,2,13,23,27,2,27,13,31,2,31,10,35,1,6,35,39,1,5,39,43,1,10,43,47,1,5,47,51,1,13,51,55,2,55,9,59,1,6,59,63,1,13,63,67,1,6,67,71,1,71,10,75,2,13,75,79,1,5,79,83,2,83,6,87,1,6,87,91,1,91,13,95,1,95,13,99,2,99,13,103,1,103,5,107,2,107,10,111,1,5,111,115,1,2,115,119,1,119,6,0,99,2,0,14,0
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66
day2/main.go
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66
day2/main.go
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package main
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import (
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"bufio"
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"errors"
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"log"
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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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file, err := os.Open("input.txt")
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if err != nil {
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log.Fatal(err)
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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if !scanner.Scan() {
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log.Fatalln("Problem while read line.")
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return
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}
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stringarr := strings.Split(scanner.Text(), ",")
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var t2 = []int{}
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for _, i := range stringarr {
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j, err := strconv.Atoi(i)
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if err != nil {
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panic(err)
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}
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t2 = append(t2, j)
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}
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// ========= Finish now, we can solve the task ======
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t2[1] = 12
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t2[2] = 2
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ParseArray(t2)
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log.Println("Part1: " + strconv.Itoa(t2[0]))
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}
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func ParseArray(list []int) error {
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for i := 0; i < len(list); i += 4 {
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cmd := list[i]
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if cmd == 99 {
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return nil
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}
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num1 := list[list[i+1]]
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num2 := list[list[i+2]]
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sum := 0
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if cmd == 1 {
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sum = num1 + num2
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} else if cmd == 2 {
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sum = num1 * num2
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} else {
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return errors.New("Wrong Command (" + strconv.Itoa(cmd) + ") at position " + strconv.Itoa(i))
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}
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list[list[i+3]] = sum
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}
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return nil
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}
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day2/main_test.go
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83
day2/main_test.go
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package main
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import (
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"strconv"
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"strings"
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"testing"
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)
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func equalsArray(arr1 []int, arr2 []int) bool {
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if len(arr1) != len(arr2) {
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return false
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}
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for i := 0; i < len(arr1); i++ {
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if arr1[i] != arr2[i] {
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return false
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}
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}
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return true
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}
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func join(arr []int) string {
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valuesText := []string{}
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for i := range arr {
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number := arr[i]
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text := strconv.Itoa(number)
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valuesText = append(valuesText, text)
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}
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return strings.Join(valuesText, ",")
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}
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func TestCalcFuelRecusive1(t *testing.T) {
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arr := []int{1, 0, 0, 0, 99}
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err := ParseArray(arr)
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if err != nil {
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t.Errorf("Error where no error should be: %v", err)
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}
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sol := []int{2, 0, 0, 0, 99}
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if !equalsArray(arr, sol) {
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t.Errorf("Array was incorrect, got: {%s}, want: {%s}.", join(arr), join(sol))
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}
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}
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func TestCalcFuelRecusive2(t *testing.T) {
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arr := []int{2, 3, 0, 3, 99}
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err := ParseArray(arr)
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if err != nil {
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t.Errorf("Error where no error should be: %v", err)
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}
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sol := []int{2, 3, 0, 6, 99}
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if !equalsArray(arr, sol) {
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t.Errorf("Array was incorrect, got: {%s}, want: {%s}.", join(arr), join(sol))
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}
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}
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func TestCalcFuelRecusive3(t *testing.T) {
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arr := []int{2, 4, 4, 5, 99, 0}
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err := ParseArray(arr)
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if err != nil {
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t.Errorf("Error where no error should be: %v", err)
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}
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sol := []int{2, 4, 4, 5, 99, 9801}
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if !equalsArray(arr, sol) {
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t.Errorf("Array was incorrect, got: {%s}, want: {%s}.", join(arr), join(sol))
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}
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}
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func TestCalcFuelRecusive4(t *testing.T) {
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arr := []int{1, 1, 1, 4, 99, 5, 6, 0, 99}
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err := ParseArray(arr)
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if err != nil {
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t.Errorf("Error where no error should be: %v", err)
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}
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sol := []int{30, 1, 1, 4, 2, 5, 6, 0, 99}
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if !equalsArray(arr, sol) {
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t.Errorf("Array was incorrect, got: {%s}, want: {%s}.", join(arr), join(sol))
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}
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}
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