fix: coding style and file format for chapter 7.

eBook/exercises/chapter_7/sum_array.go

@@ -1,39 +1,38 @@
-// leaving out the length 4 in [4] uses  slice instead of an array
-// which is generally better for performance
-package main
-
-import "fmt"
-
-func main() {
-	// var a = [4]float32 {1.0,2.0,3.0,4.0}
-	var a = []float32 {1.0,2.0,3.0,4.0}
-	fmt.Printf("The sum of the array is: %f\n", Sum(a))
-	var b = []int {1, 2, 3, 4, 5}
-	sum, average := SumAndAverage(b)
-	fmt.Printf("The sum of the array is: %d, and the average is: %f", sum, average)
-}
-
-/*
-func Sum(a [4]float32) (sum float32) {
-	for _, item := range a {
-		sum += item
-	}
-	return
-}
-*/
-
-func Sum(a []float32) (sum float32) {
-	for _, item := range a {
-		sum += item
-	}
-	return
-}
-
-func SumAndAverage (a []int) (int, float32) {
-  sum := 0
-  for _, item := range a {
-    sum += item
-  }
-  return sum, float32(sum/len(a))
-}
-
+// leaving out the length 4 in [4] uses  slice instead of an array
+// which is generally better for performance
+package main
+
+import "fmt"
+
+func main() {
+	// var a = [4]float32 {1.0,2.0,3.0,4.0}
+	var a = []float32{1.0, 2.0, 3.0, 4.0}
+	fmt.Printf("The sum of the array is: %f\n", Sum(a))
+	var b = []int{1, 2, 3, 4, 5}
+	sum, average := SumAndAverage(b)
+	fmt.Printf("The sum of the array is: %d, and the average is: %f", sum, average)
+}
+
+/*
+func Sum(a [4]float32) (sum float32) {
+	for _, item := range a {
+		sum += item
+	}
+	return
+}
+*/
+
+func Sum(a []float32) (sum float32) {
+	for _, item := range a {
+		sum += item
+	}
+	return
+}
+
+func SumAndAverage(a []int) (int, float32) {
+	sum := 0
+	for _, item := range a {
+		sum += item
+	}
+	return sum, float32(sum / len(a))
+}