c – 添加类后的项目链接错误

我正在编写一个3D图像引擎(它读取带有场景信息的 XML并用openGL打印),用于大学,在visual studio中(不幸的是……),我正在做解析器atm,它将xml读入一个简单的树状数据结构.其中一个元素是Camera,在我添加数据结构的那部分之前,程序运行正常,但是在我添加它之后,我遇到以下错误：

1>LIBCMT.lib(stdexcpt.obj) : error LNK2005: "public: virtual char const * __thiscall std::exception::what(void)const " (?what@exception@std@@UBEPBDXZ) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(stdexcpt.obj) : error LNK2005: "public: __thiscall std::exception::exception(char const * const &)" (??0exception@std@@QAE@ABQBD@Z) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(stdexcpt.obj) : error LNK2005: "public: virtual __thiscall std::exception::~exception(void)" (??1exception@std@@UAE@XZ) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(stdexcpt.obj) : error LNK2005: "public: __thiscall std::exception::exception(class std::exception const &)" (??0exception@std@@QAE@ABV01@@Z) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(_fpinit_.obj) : error LNK2005: __fltused already defined in a previous module
1>LIBCMT.lib(_fpinit_.obj) : error LNK2005: __ldused already defined in a previous module
1>LIBCMT.lib(invarg.obj) : error LNK2005: __invoke_watson already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(invarg.obj) : error LNK2005: __invalid_parameter already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(_ctype.obj) : error LNK2005: _isalpha already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(_ctype.obj) : error LNK2005: _isspace already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(_ctype.obj) : error LNK2005: _isalnum already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: __initterm_e already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: _exit already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: __exit already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: __cexit already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0dat.obj) : error LNK2005: __amsg_exit already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(mlock.obj) : error LNK2005: __unlock already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(mlock.obj) : error LNK2005: __lock already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(winxfltr.obj) : error LNK2005: __XcptFilter already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(setlocal.obj) : error LNK2005: __configthreadlocale already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(hooks.obj) : error LNK2005: "void __cdecl terminate(void)" (?terminate@@YAXXZ) already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(crt0init.obj) : error LNK2005: ___xi_a already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMT.lib(crt0init.obj) : error LNK2005: ___xi_z already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMT.lib(crt0init.obj) : error LNK2005: ___xc_a already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMT.lib(crt0init.obj) : error LNK2005: ___xc_z already defined in MSVCRTD.lib(cinitexe.obj)
1>LIBCMT.lib(crt0.obj) : error LNK2005: _mainCRTStartup already defined in MSVCRTD.lib(crtexe.obj)
1>LIBCMT.lib(errmode.obj) : error LNK2005: ___set_app_type already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(atox.obj) : error LNK2005: _atoi already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(tolower.obj) : error LNK2005: _tolower already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LIBCMT.lib(strtol.obj) : error LNK2005: _strtol already defined in MSVCRTD.lib(MSVCR100D.dll)
1>LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library
1>LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library
1>binCGFexample.exe : fatal error LNK1169: one or more multiply defined symbols found

我无法理解为什么添加一个简单的新类会产生如此奇怪的错误,任何人都可以帮忙吗？

附：如果需要,我会添加相机类,但它实际上只是一堆带有集合的变量和获取和两个子类(有两种类型的相机),我不认为问题是因为类本身无论如何.