Question

I have several struct: edge, vertex, graph in my library. I want to hide body of that structs from user (user have to use API), so in header file (eg. edge.h) I ve just put:

typedef struct edge edge_t;

And definition of edge struct is in edge.c

struct edge {...};

这种做法是完美的,但我不想从我自己的法典中掩盖结构。我想在前线使用:c

vertex_t v;
v.some_attribute = x;

Now I get dereferencing pointer to incomplete type errors, is it possible to fix that? Is there any other option that use accessors (like user) for all struct elements?

Answer 1

如果你需要从其他来源的档案中利用结构,就需要对结构作出完整的定义。因此,解决办法是将<代码>struct wei{ ∗ / }列入标题文件中,并在需要时列入标题。

Answer 2

Joachim Pileborg是正确的。

汇编者需要了解能够与之合作的结构规模。防止这种情况的唯一途径是迫使用户使用点。

www.un.org/Depts/DGACM/index_french.htm

汇编者知道点人的规模,因此,它知道需要为之分配多少空间。

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