From 84df183d0ee92cef35114a75d009f940f514acb7 Mon Sep 17 00:00:00 2001
From: RickyWang1020 <50431019+RickyWang1020@users.noreply.github.com>
Date: Fri, 28 Aug 2020 11:04:21 +0800
Subject: [PATCH] Update golang_tutorial_15.md

---
 docs/golang_tutorial_15.md | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/docs/golang_tutorial_15.md b/docs/golang_tutorial_15.md
index 0773d65..7c95573 100644
--- a/docs/golang_tutorial_15.md
+++ b/docs/golang_tutorial_15.md
@@ -156,3 +156,31 @@ value of b is 255
 new value of b is 256  
 ```
 
+## 将指针传入函数
+
+```golang
+package main
+
+import (  
+    "fmt"
+)
+
+func change(val *int) {  
+    *val = 55
+}
+func main() {  
+    a := 58
+    fmt.Println("value of a before function call is",a)
+    b := &a
+    change(b)
+    fmt.Println("value of a after function call is", a)
+}
+```
+
+在第 14 行，我们将存有 `a` 的地址的指针 `b` 传入了 `change` 函数。`change` 函数通过间接引用的方法改变了 `a` 的值，程序输出：
+
+```golang
+value of a before function call is 58  
+value of a after function call is 55 
+```
+