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                            # 匿名字段

#### 定義

```
<pre class="calibre13">```
只提供類型而不寫字段名的方式，也就是匿名字段，也稱為嵌入字段

```
```

```
<pre class="calibre14">```
<span class="token2">package</span> main

<span class="token2">import</span> <span class="token4">"fmt"</span>

<span class="token6">//?    go支持只提供類型而不寫字段名的方式，也就是匿名字段，也稱為嵌入字段</span>

<span class="token6">//人</span>
type Person struct <span class="token1">{</span>
    name string
    sex  string
    age  int
<span class="token1">}</span>

type Student struct <span class="token1">{</span>
    Person  <span class="token6">//只提供了類型</span>
    id   int
    addr string
<span class="token1">}</span>

func <span class="token3">main</span><span class="token1">(</span><span class="token1">)</span> <span class="token1">{</span>
    <span class="token6">// 初始化</span>
    s1 <span class="token1">:</span><span class="token">=</span> Student<span class="token1">{</span>Person<span class="token1">{</span><span class="token4">"5lmh"</span><span class="token1">,</span> <span class="token4">"man"</span><span class="token1">,</span> <span class="token5">20</span><span class="token1">}</span><span class="token1">,</span> <span class="token5">1</span><span class="token1">,</span> <span class="token4">"bj"</span><span class="token1">}</span>
    fmt<span class="token1">.</span><span class="token3">Println</span><span class="token1">(</span>s1<span class="token1">)</span>

    s2 <span class="token1">:</span><span class="token">=</span> Student<span class="token1">{</span>Person<span class="token1">:</span> Person<span class="token1">{</span><span class="token4">"5lmh"</span><span class="token1">,</span> <span class="token4">"man"</span><span class="token1">,</span> <span class="token5">20</span><span class="token1">}</span><span class="token1">}</span>
    fmt<span class="token1">.</span><span class="token3">Println</span><span class="token1">(</span>s2<span class="token1">)</span>

    s3 <span class="token1">:</span><span class="token">=</span> Student<span class="token1">{</span>Person<span class="token1">:</span> Person<span class="token1">{</span>name<span class="token1">:</span> <span class="token4">"5lmh"</span><span class="token1">}</span><span class="token1">}</span>
    fmt<span class="token1">.</span><span class="token3">Println</span><span class="token1">(</span>s3<span class="token1">)</span>
<span class="token1">}</span>

```
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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