编译时遇到的问题（和lib有关）

[fenex]

写了个程序，分成界面和核心功能两部分。先把核心生成一个lib，然后在界面中调用。lib编译通过，但在编译联接界面部分时出现如下错误：
libcd.lib(crt0dat.obj) : error LNK2005: _exit already defined in msvcrtd.lib(MSVCRTD.dll)
libcd.lib(crt0dat.obj) : error LNK2005: __exit already defined in msvcrtd.lib(MSVCRTD.dll)
libcd.lib(fpinit.obj) : error LNK2005: __ldused already defined in a previous module
libcd.lib(fpinit.obj) : error LNK2005: __fltused already defined in a previous module
libcd.lib(winxfltr.obj) : error LNK2005: __XcptFilter already defined in msvcrtd.lib(MSVCRTD.dll)
libcd.lib(crt0init.obj) : error LNK2005: ___xc_z already defined in msvcrtd.lib(cinitexe.obj)
libcd.lib(crt0init.obj) : error LNK2005: ___xc_a already defined in msvcrtd.lib(cinitexe.obj)
libcd.lib(crt0init.obj) : error LNK2005: ___xi_z already defined in msvcrtd.lib(cinitexe.obj)
libcd.lib(crt0init.obj) : error LNK2005: ___xi_a already defined in msvcrtd.lib(cinitexe.obj)
msvcrtd.lib(MSVCRTD.dll) : error LNK2005: __setmbcp already defined in libcd.lib(mbctype.obj)
LINK : warning LNK4098: defaultlib "msvcrtd.lib" conflicts with use of other libs; use /NODEFAULTLIB:library
msvcrtd.lib(cinitexe.obj) : warning LNK4098: defaultlib "libcd.lib" conflicts with use of other libs; use /NODEFAULTLIB:library
libcd.lib(crt0.obj) : error LNK2001: unresolved external symbol _main

但我在lib里没有定义过exit之类的东西。这是什么回事啊？

[ruihuahan]

use /NODEFAULTLIB:library
是用这个连结选项试试。