From 5070a0bb28322d8562fd964baad4b9cb3917aebd Mon Sep 17 00:00:00 2001
From: rabbit <d_rabbit@21cn.com>
Date: Mon, 17 Aug 2020 11:16:11 +0800
Subject: [PATCH 1/3] Create FindAverage.java

add a findAverage java file in maths directory
---
 Maths/FindAverage.java | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Maths/FindAverage.java

diff --git a/Maths/FindAverage.java b/Maths/FindAverage.java
new file mode 100644
index 000000000..ecb13ccff
--- /dev/null
+++ b/Maths/FindAverage.java
@@ -0,0 +1,25 @@
+package Maths;
+
+public class FindAverage {
+
+    //Driver
+    public static void main(String[] args) {
+        int[] array = {2, 4, 10};
+        assert findAverage(array) == 5;
+    }
+
+    /**
+     * find average value of array
+     *
+     * @param array the array contains element and the sum does not 
+     * excess long value limit
+     * @return average value
+     */
+    public static int findAverage(int[] array) {
+        long sum = 0;
+        for (int i = 0 ; i < array.length; ++i) {
+            sum += array[i];
+        }
+        return (int)(sum / array.length);
+    }
+}

From 9486101fb65180f02091871577750fdc6e83ba67 Mon Sep 17 00:00:00 2001
From: rabbit <d_rabbit@21cn.com>
Date: Tue, 18 Aug 2020 09:41:32 +0800
Subject: [PATCH 2/3] Revert "Create FindAverage.java"

This reverts commit 5070a0bb28322d8562fd964baad4b9cb3917aebd.
---
 Maths/FindAverage.java | 25 -------------------------
 1 file changed, 25 deletions(-)
 delete mode 100644 Maths/FindAverage.java

diff --git a/Maths/FindAverage.java b/Maths/FindAverage.java
deleted file mode 100644
index ecb13ccff..000000000
--- a/Maths/FindAverage.java
+++ /dev/null
@@ -1,25 +0,0 @@
-package Maths;
-
-public class FindAverage {
-
-    //Driver
-    public static void main(String[] args) {
-        int[] array = {2, 4, 10};
-        assert findAverage(array) == 5;
-    }
-
-    /**
-     * find average value of array
-     *
-     * @param array the array contains element and the sum does not 
-     * excess long value limit
-     * @return average value
-     */
-    public static int findAverage(int[] array) {
-        long sum = 0;
-        for (int i = 0 ; i < array.length; ++i) {
-            sum += array[i];
-        }
-        return (int)(sum / array.length);
-    }
-}

From 94a65964d8905994c5b64a56128ad46007553341 Mon Sep 17 00:00:00 2001
From: rabbit <d_rabbit@21cn.com>
Date: Tue, 18 Aug 2020 09:50:59 +0800
Subject: [PATCH 3/3] Update Average.java

1. add int type array
2. The equality of floating-point numbers should be judged by the absolute value of the difference less than a small number
---
 Maths/Average.java | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/Maths/Average.java b/Maths/Average.java
index 35812ecc4..9f4bb3af6 100644
--- a/Maths/Average.java
+++ b/Maths/Average.java
@@ -4,10 +4,13 @@ package Maths;
  * Calculate average of a list  of numbers
  */
 public class Average {
+    private static final double SMALL_VALUE = 0.00001f;
     public static void main(String[] args) {
-        assert average(new double[]{3, 6, 9, 12, 15, 18, 21}) == 12;
-        assert average(new double[]{5, 10, 15, 20, 25, 30, 35}) == 20;
-        assert average(new double[]{1, 2, 3, 4, 5, 6, 7, 8}) == 4.5;
+        assert Math.abs(average(new double[]{3, 6, 9, 12, 15, 18, 21}) - 12) < SMALL_VALUE;
+        assert Math.abs(average(new double[]{5, 10, 15, 20, 25, 30, 35}) - 20) < SMALL_VALUE;
+        assert Math.abs(average(new double[]{1, 2, 3, 4, 5, 6, 7, 8}) - 4.5) < SMALL_VALUE;
+        int[] array = {2, 4, 10};
+        assert average(array) == 5;
     }
 
     /**
@@ -23,4 +26,19 @@ public class Average {
         }
         return sum / numbers.length;
     }
-}
+    
+    /**
+     * find average value of int array
+     *
+     * @param array the array contains element and the sum does not 
+     * excess long value limit
+     * @return average value
+     */
+    public static int average(int[] array) {
+        long sum = 0;
+        for (int i = 0 ; i < array.length; ++i) {
+            sum += array[i];
+        }
+        return (int)(sum / array.length);
+    }
+}
\ No newline at end of file