请高手帮忙,编译《Windows游戏编程大师技巧》中freakout的例

mikebibi

就是那个freakout的例子，已经按着书上的提示把路径和库文件都设置好了
编译可以通过，但无法链接
提示错误

Linking...
FREAKOUT.OBJ : error LNK2005: _WinMain@16 already defined in BLACKBOX.obj
FREAKOUT.OBJ : error LNK2001: unresolved external symbol "int __cdecl Draw_Rectangle(int,int,int,int,int,struct IDirectDrawSurface4 *)" (?Draw_Rectangle@@YAHHHHHHPAUIDirectDrawSurface4@@@Z)
FREAKOUT.OBJ : error LNK2001: unresolved external symbol "struct IDirectDrawSurface4 * lpddsback" (?lpddsback@@3PAUIDirectDrawSurface4@@A)
FREAKOUT.OBJ : error LNK2001: unresolved external symbol "int __cdecl DD_Shutdown(void)" (?DD_Shutdown@@YAHXZ)
FREAKOUT.OBJ : error LNK2001: unresolved external symbol "unsigned long __cdecl Wait_Clock(unsigned long)" (?Wait_Clock@@YAKK@Z)
FREAKOUT.OBJ : error LNK2001: unresolved external symbol "int __cdecl DD_Flip(void)" (?DD_Flip@@YAHXZ)
FREAKOUT.OBJ : error LNK2001: unresolved external symbol "int __cdecl Draw_Text_GDI(char *,int,int,int,struct IDirectDrawSurface4 *)" (?Draw_Text_GDI@@YAHPADHHHPAUIDirectDrawSurface4@@@Z)
FREAKOUT.OBJ : error LNK2001: unresolved external symbol "unsigned long __cdecl Start_Clock(void)" (?Start_Clock@@YAKXZ)
FREAKOUT.OBJ : error LNK2001: unresolved external symbol "int __cdecl DD_Init(int,int,int)" (?DD_Init@@YAHHHH@Z)
Debug/BLACKBOX.exe : fatal error LNK1120: 8 unresolved externals
Error executing link.exe.

BLACKBOX.exe - 10 error(s), 0 warning(s)

lingjingqiu

CPP没有加入到工程里面。