From 96a885a46c4bcc3ff6e814a54248fece47ab06a0 Mon Sep 17 00:00:00 2001
From: Wu <codean.net@gmail.com>
Date: Sun, 4 Feb 2024 20:32:29 +0800
Subject: [PATCH] docs: update pointer

---
 content/introduction/pointer.md | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/content/introduction/pointer.md b/content/introduction/pointer.md
index f8db226..9592671 100644
--- a/content/introduction/pointer.md
+++ b/content/introduction/pointer.md
@@ -105,6 +105,22 @@ uintptr 是一个可以表示任何指针地址的整数。
 1. 任何类型的指针和 unsafe.Pointer 可以相互转换。
 2. uintptr 类型和 unsafe.Pointer 可以相互转换。
 
+```go
+package main
+
+import (
+	"math"
+	"unsafe"
+)
+
+func main() {
+	var p uintptr
+	x := math.MaxFloat64
+	p = uintptr(unsafe.Pointer(&x))
+	println(unsafe.Sizeof(p)) // 8
+}
+```
+
 # 扩展阅读
 
 1. [指针 - 维基百科](https://zh.m.wikipedia.org/zh-cn/%E6%8C%87%E6%A8%99_(%E9%9B%BB%E8%85%A6%E7%A7%91%E5%AD%B8))