解决VC6.0中编译程序时的警告：warning LNK4098

warning LNK4098: defaultlib "LIBCMT" conflicts with use of other libs; use /NODEFAULTLIB:library

这是由于同一个程序中使用了不同版本的链接库。
解决此问题可以在设置中忽略掉相应的库即可。
方法是在菜单：Project -> Settings...
选择"Link"中的"Input"，在"Ignore libraries"中输入要忽略掉的库名称。

需要忽略的库的名字，根据 Settings中"C/C++"的"Code Generation"选项卡下的"Use run-time library"的设置有关：

To use this run-time           library Ignore these libraries
Single-threaded (libc.lib)            libcmt.lib, msvcrt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
Multithreaded (libcmt.lib)            libc.lib, msvcrt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
Multithreaded using DLL (msvcrt.lib)  libc.lib, libcmt.lib, libcd.lib, libcmtd.lib, msvcrtd.lib
Debug Single-threaded (libcd.lib)     libc.lib, libcmt.lib, msvcrt.lib, libcmtd.lib, msvcrtd.lib
Debug Multithreaded (libcmtd.lib)     libc.lib, libcmt.lib, msvcrt.lib, libcd.lib, msvcrtd.lib
Debug Multithreaded using DLL (msvcrtd.lib)  libc.lib, libcmt.lib, msvcrt.lib, libcd.lib, libcmtd.lib

详细请看MSDN：
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/HTML/lnk4098.asp