fix: fix the DecimalNumberToBinary function

binary/binary.go

@@ -5,14 +5,26 @@
 // Package binary provides some operations of binary number and decimal number.
 package binary
 
+import "fmt"
+
 // DecimalNumberToBinary Return a binary array.
-func DecimalNumberToBinary(num int) []int {
-	var binary []int
+func DecimalNumberToBinary(num int) ([]int, []string, string) {
+	var (
+		binary       []int
+		binaryString []string
+		str          string
+	)
 
 	for num != 0 {
-		binary = append(binary, num%2)
+		var (
+			bit    = num % 2
+			bitStr = fmt.Sprintf("%d", bit)
+		)
+		binary = append([]int{bit}, binary...)
+		binaryString = append([]string{bitStr}, binaryString...)
+		str = bitStr + str
 		num = num / 2
 	}
 
-	return binary
+	return binary, binaryString, str
 }

binary/binary_test.go

@@ -1,14 +1,14 @@
 package binary
 
 import (
-	"github.com/WGrape/golib/array"
 	"reflect"
 	"testing"
 )
 
 // TestDecimalNumberToBinary Test the function DecimalNumberToBinary
 func TestDecimalNumberToBinary(t *testing.T) {
-	if !reflect.DeepEqual(array.Reverse(DecimalNumberToBinary(4)), []int{1, 0, 0}) {
+	var intArr, strArr, str = DecimalNumberToBinary(4)
+	if !reflect.DeepEqual(intArr, []int{1, 0, 0}) || !reflect.DeepEqual(strArr, []string{"1", "0", "0"}) || str != "100" {
 		t.Fail()
 		return
 	}