我如何获得成员的结构多少？ [英] How do I get the number of members in a structure?

问题描述

我要计算一个结构成员的数量。
例如：

I want to count the number of members in a structure. For example:

typedef struct
{
    char    MrChar;
    int MrInt;
    long    MrLong;
} Bg_Typedef;
Bg_Typedef FooStr;

我创建了一个函数原型应该在结构返回成员人数

I create a function prototype that should return number of members in the structure

int NumberOfMem(Bg_Typedef *psStructure); 

=> NumberOfMem（安培; FooStr）应该返回3

=> NumberOfMem(&FooStr) should return 3

推荐答案

有没有办法做到这一点是内置到C语言AFAIK。如果你想做到这一点，你需要记住的成员或硬code中的数量的多少作为函数的返回值。 C能告诉你在你的结构的字节大小而不是它们所包含的成员数。另外，您可以使用结构的成员函数返回成员的辛勤codeD编号。

There is no way to do this that is inbuilt into the C language AFAIK. If you want to do this you would need to remember the number of members or hard code the number as return value of your function. C can tell you the size in bytes of your structs but not the number of members they contain. Alternatively you could use a member function of your struct to return the hard coded number of members.

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