c - 错误: 'void*' is not a pointer-to-object type

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我正在我的程序中尝试以下代码并收到错误。

abc rec; //abc is a struct which is having data member with void*.

rec.data = (price*)malloc(sizeof(price)); //rec.data is a void* and price is a structure

emp * e = (emp *)calloc(2, sizeof(emp)); // emp is a struct, which is member of struct price.
e[0].a = 1; 
rec.data->emp = e; // error: 'void*' is not a pointer-to-object type

任何人都可以对此提出建议吗？

Answer 1

data 的类型为 void*，因此 data->emp 的类型为 void，其中你不能真正拥有，更不用说分配了。