day 3a complete

day3/3a/go.mod

@@ -0,0 +1,3 @@
+module PWD
+
+go 1.17

day3/3a/main.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"math"
+	"os"
+)
+
+func main() {
+	content := returnContent("../input")
+	//content := returnContent("testInput")
+
+	gamma, epsilon := findGammaAndEpsilon(content)
+
+	fmt.Println(binaryToInteger(gamma) * binaryToInteger(epsilon))
+
+}
+
+func findGammaAndEpsilon(content *[]string) (gamma string, epsilon string) {
+	for i := 0; i < len((*content)[1]); i++ {
+		count := 0
+
+		//Loop through list checking index[i] for each string
+		for j := 0; j < len(*content); j++ {
+			if ((*content)[j])[i] == '1' {
+				count++
+			}
+		}
+
+		if count >= len(*content)/2 {
+			gamma += "1"
+			epsilon += "0"
+		} else {
+			gamma += "0"
+			epsilon += "1"
+		}
+
+	}
+	return
+}
+
+func binaryToInteger(input string) (value int) {
+	n := 0
+	for i := len(input) - 1; i >= 0; i-- {
+		if input[i] == '1' {
+			value += (int(math.Pow(float64(2), float64(n))))
+		}
+		n++
+	}
+	return
+}
+
+func returnContent(path string) *[]string {
+	//read file and return it as an array of integers
+
+	file, err := os.Open(path)
+	var content []string
+
+	if err != nil {
+		fmt.Println("Unlucky, the file didn't open")
+		return &content
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		content = append(content, scanner.Text())
+	}
+
+	return &content
+}

day3/3a/testInput

@@ -0,0 +1,12 @@
+00100
+11110
+10110
+10111
+10101
+01111
+00111
+11100
+10000
+11001
+00010
+01010