LNK2019。。
项目 --> 属性 --> 链接器 --> 输入 --> 附近依赖项。。。这个的，不适用，应该。。。因为，都是我自己写的struct _2nDs_Vector2D
{
float x;
float y;
inline void Set(float fx, float fy);
inline void Set(const _2nDs_Vector2D& vector);
........其他.....飘过.......
}
别的2nDs_Math.h
#include "Vector2D.h"
GLubyte isEdgeToEdgeIntersection(const _2nDs_Vector2D& A, const _2nDs_Vector2D& B, const _2nDs_Vector2D& C, const _2nDs_Vector2D& D, _2nDs_Vector2D* IntSecPoint);
2nDs_ Math.cpp
GLubyte isEdgeToEdgeIntersection(const _2nDs_Vector2D& A, const _2nDs_Vector2D& B, const _2nDs_Vector2D& C, const _2nDs_Vector2D& D, _2nDs_Vector2D* IntSecPoint)
{
.........
if (A.IsEqualTo(B)) IntSecPoint->Set(A);
.........
}
error LNK2019: unresolved external symbol "public: void __thiscall _2nDs_Vector2D::Set(struct _2nDs_Vector2D const &)" (?Set@_2nDs_Vector2D@@QAEXABU1@@Z) referenced in function "unsigned char __cdecl isEdgeToEdgeIntersection(struct _2nDs_Vector2D const &,struct _2nDs_Vector2D const &,struct _2nDs_Vector2D const &,struct _2nDs_Vector2D const &,struct _2nDs_Vector2D *)" (?isEdgeToEdgeIntersection@@YAEABU_2nDs_Vector2D@@000PAU1@@Z) C:\Documents and Settings\secondsen\My Documents\Visual Studio 2010\Projects\2nDs_Engine\2nDs_Engine\2nDs_Maths.obj 2nDs_Engine
都是我自己写的，也包含了，LNK2019是怎么蹦出来的？
补充一下。。Set和IsEqualTo都报了LNK2019 _2nDs_Vector2D这个struct只有定义，没有实现么？ 有实现的，就是赋值 放在相应的cpp中，声明在.h中 2nDs_Vector2D.h
#ifndef _2nDs_VECTOR2D_H_
#define _2nDs_VECTOR2D_H_
#include "2nDs_System.h"
struct _2nDs_Vector2D
{
GLfloat x;
GLfloat y;
_2nDs_Vector2D(GLvoid):x(0), y(0){}
_2nDs_Vector2D(GLfloat value):x(value), y(value){}
_2nDs_Vector2D(GLfloat fx, GLfloat fy):x(fx), y(fy){}
_2nDs_Vector2D(const float* values):x((*values)), y((*values)+1){}
_2nDs_Vector2D(_2nDs_Vector2D& vector2D):x(vector2D.x), y(vector2D.y){}
inline GLvoid Set(GLfloat fx, GLfloat fy);
inline GLvoid Set(const _2nDs_Vector2D& vector);
inline GLvoid LoadIdentity(GLvoid);
inline GLvoid Normalize(GLvoid);
inline GLvoid RotateDeg(GLfloat angle);
inline GLvoid RotateRad(GLfloat angle);
inline GLvoid GetNormalized(_2nDs_Vector2D& vector) const;
inline GLvoid GetRotatedDeg(GLfloat angle, _2nDs_Vector2D& vector) const;
inline GLvoid GetRotatedRad(GLfloat angle, _2nDs_Vector2D& vector) const;
inline GLfloat GetLength() const;
inline GLfloat GetSquaredLength() const;
inline GLvoid Lerp(const _2nDs_Vector2D& src, GLfloat factor, _2nDs_Vector2D& dst);
inline GLvoid IsSumOf(const _2nDs_Vector2D& vector1, const _2nDs_Vector2D& vector2);
inline GLvoid IsDifferenceOf(const _2nDs_Vector2D& vector1, const _2nDs_Vector2D& vector2);
inline GLvoid IsProductOf(const _2nDs_Vector2D& vector1, const _2nDs_Vector2D& vector2);
inline GLvoid IsQuotientOf(const _2nDs_Vector2D& vector1, const _2nDs_Vector2D& vector2);
inline GLvoid IsSumOf(const _2nDs_Vector2D& vector, const GLfloat value);
inline GLvoid IsDifferenceOf(const _2nDs_Vector2D& vector, const GLfloat value);
inline GLvoid IsProductOf(const _2nDs_Vector2D& vector, const GLfloat value);
inline GLvoid IsQuotientOf(const _2nDs_Vector2D& vector, const GLfloat value);
inline GLvoid Plus(const _2nDs_Vector2D& vector);
inline GLvoid Subtract(const _2nDs_Vector2D& vector);
inline GLvoid Multiply(const _2nDs_Vector2D& vector);
inline GLvoid Divide(const _2nDs_Vector2D& vector);
inline GLvoid Plus(const GLfloat value);
inline GLvoid Subtract(const GLfloat value);
inline GLvoid Multiply(const GLfloat value);
inline GLvoid Divide(const GLfloat value);
inline GLvoid Invert(_2nDs_Vector2D& vector);
inline GLvoid Inverted(GLvoid);
inline GLfloat DotMultiply(const _2nDs_Vector2D& vector);
inline GLvoid CrossMultiply(const _2nDs_Vector2D& vector, _2nDs_Vector2D& Dst);
inline GLboolean IsEqualTo(const _2nDs_Vector2D& vector) const;
inline GLboolean IsUnequalTo(const _2nDs_Vector2D& vector) const;
};
#endif
2nDs_Vector2D.cpp
#include "2nDs_Vector2D.h"
#include "2nDs_Maths.h"
inline GLvoid _2nDs_Vector2D::Set(GLfloat fx, GLfloat fy) {x = fx; y = fy;}
inline GLvoid _2nDs_Vector2D::Set(const _2nDs_Vector2D& vector) {x = vector.x; y = vector.y;}
inline GLvoid _2nDs_Vector2D::LoadIdentity(GLvoid) {x = 0.0f; y = 0.0f;}
inline GLvoid _2nDs_Vector2D::Normalize(GLvoid)
{
GLfloat l = GetLength();
if(l == 1 || l == 0) return;
x /= l;
y /= l;
}
。。。。。。其他。。。。 看不出来有什么明显的问题，如果编译出的目标文件里确实是有2nDs_Vector2D.obj的话，我猜可能是你的项目工程组织结构的问题吧。
同等专业的程序员来解惑。 引用第4楼shawind于2012-09-14 08:42发表的:
我猜可能是你的项目工程组织结构的问题吧。
组织结构是指？？包含来包含去的，弄得一团乱麻？？ 引用第5楼secondsen于2012-09-14 09:19发表的 :
组织结构是指？？包含来包含去的，弄得一团乱麻？？
....... images/back.gif
是的，比如说，链接的时候link.exe没找到2nDs_Vector2D.obj。又或者有什么预定义不小心把2nDs_Vector2D.cpp里的实现给忽略过去了。不过，直接用IDE管理的项目，一般是不会出这种问题的。
你以用 dumpbin /SYMBOLS 2nDs_Vector2D.obj > 2nDs_Vector2D.txt
然后打开2nDs_Vector2D.txt看看里面有没有set等方法的符号，
如果有，就是你的link.exe找不到2nDs_Vector2D.obj文件。
如果没有，就是你的具体实现根本没有被编译出来。 Microsoft (R) COFF/PE Dumper Version 10.00.30319.01
Copyright (C) Microsoft Corporation. All rights reserved.
Dump of file 2nDs_Vector2D.obj
File Type: COFF OBJECT
COFF SYMBOL TABLE
000 00AB766F ABS notype Static | @comp.id
001 00000001 ABS notype Static | @feat.00
002 00000000 SECT1 notype Static | .drectve
Section length 41, #relocs 0, #linenums 0, checksum 0
Relocation CRC 00000000
005 00000000 SECT2 notype Static | .debug$S
Section length 1370, #relocs 0, #linenums 0, checksum 0
Relocation CRC 00000000
008 00000000 SECT3 notype Static | .debug$T
Section length 94, #relocs 0, #linenums 0, checksum 0
Relocation CRC 00000000
String Table Size = 0x0 bytes
Summary
1370 .debug$S
94 .debug$T
41 .drectve
实现部分没有编译出来的意思？？ 应该是这样了，从这个结果来看，2nDs_Vector2D.cpp的几乎像是空文件。
你查下，是不是有#define...这类的条件编译开关把具体代码给忽略过去了。 感觉 略 崩溃
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