函数指针的数组在链接时找不到函数实现

[jiandingzhe]

我有一个类成员，它是一个函数指针的数组，里面存储若干个函数的地址：
头文件：

typedef unsigned char (*support_point_func)(const Shape& shape, const VectorF& n, VectorF& result);

unsigned char support_sphere     (const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_box        (const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_cylinder   (const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_capsule    (const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_convex_hull(const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_complex    (const Shape& shape, const VectorF& n, VectorF& result);

class Shape
{
    static support_point_func support_point_func_table[];
}

实现文件：

unsigned char support_sphere(const Shape& shape, const VectorF& n, VectorF& result)
{
}

unsigned char support_box(const Shape& shape, const VectorF& n, VectorF& result)
{
}

unsigned char support_cylinder(const Shape& shape, const VectorF& n, VectorF& result)
{
}

unsigned char support_capsule(const Shape& shape, const VectorF& n, VectorF& result)
{
}

unsigned char support_convex_hull(const Shape& shape, const VectorF& n, VectorF& result)
{
}

unsigned char support_complex(const Shape& shape, const VectorF& n, VectorF& result)
{
}

support_point_func Shape::support_point_func_table[] = 
{
    &support_sphere,
    &support_box,
    &support_cylinder,
    &support_capsule,
    &support_convex_hull,
    &support_complex
};

最终会在链接时，声称找不到那些函数。这是为什么？

[bluesky0318]

你既然已经用typedef定义了函数指针类型，怎么后面又把函数重新定义呢？很奇怪的用法

[图灵狗]

这样就可以了：

class Shape;
struct VectorF;

typedef unsigned char (*support_point_func)(const Shape& shape, const VectorF& n, VectorF& result);

unsigned char support_sphere     (const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_box        (const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_cylinder   (const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_capsule    (const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_convex_hull(const Shape& shape, const VectorF& n, VectorF& result);
unsigned char support_complex    (const Shape& shape, const VectorF& n, VectorF& result);

class Shape
{
    static support_point_func support_point_func_table[];
};

[jiandingzhe]

[Quote=引用 2 楼 的回复:]

这样就可以了：
C/C++ code

class Shape;
struct VectorF;

typedef unsigned char (*support_point_func)(const Shape& shape, const VectorF& n, VectorF& result);

unsigned char support_sphere (……
[/Quote]
后来发现是名字空间的问题，我没在主楼里写出来。