部署好winpcap环境后，编译报错：
e:\codeblocks\mingw\bin..\lib\gcc\mingw32\4.7.1\include\c++\cstdio|169|error: '::snprintf' has not been declared|
e:\codeblocks\mingw\bin..\lib\gcc\mingw32\4.7.1\include\c++\cstdio|172|error: '::vsnprintf' has not been declared|
e:\codeblocks\mingw\bin..\lib\gcc\mingw32\4.7.1\include\c++\cstdio|179|error: '__gnu_cxx::snprintf' has not been declared|
e:\codeblocks\mingw\bin..\lib\gcc\mingw32\4.7.1\include\c++\cstdio|182|error: '__gnu_cxx::vsnprintf' has not been declared|