C++ 不允许指针指向不完整的类类型

C语言不允许指针指向不完整的类类型。这个问题通常有两个原因。首先，可能是因为没有包含对应结构体的头文件。解决办法是直接添加相应的头文件。另外，可能是因为对应的结构体定义写在了C/CPP文件中而不是头文件中。解决办法是将结构体定义写在对应的头文件中。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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