我是C / VS的新手,可能会在项目的代码/配置中遗漏一些东西 . 在我的解决方案中,我有2个项目:
-
首先是我从https://bitbucket.org/ben_key/ntl下载的NTL,并编译为静态库NTL.lib .
-
一个'test'项目,其中:(1)我通过在属性 - > C - >附加包含文件中指定了它们的目录,添加了头文件,属性 - >链接器 - >输入 - >附加依赖项中的(2)我添加了"NTL.lib" (3)将NTL.lib文件复制到与'test'项目的主cpp文件相同的目录中 .
我的cpp只包含:
#include <NTL/GF2X.h>
int main() {
GF2X P;
return 1;
}
构建提供输出:
1>------ Build started: Project: test, Configuration: Release Win32 ------
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.CppBuild.targets(388,5): warning MSB8028: The intermediate directory (Release\) contains files shared from another project (ntl-test.vcxproj). This can lead to incorrect clean and rebuild behavior.
1> QuickTest.cpp
1>..\tests\QuickTest.cpp(43): warning C4101: 'n' : unreferenced local variable
1>D:\studies\Thesis\NTL-Ben-Key\Include\NTL/vector.h(79): warning C4291: 'void *operator new(size_t,_ntl_vector_placement)' : no matching operator delete found; memory will not be freed if initialization throws an exception
1> D:\studies\Thesis\NTL-Ben-Key\Include\NTL/vector.h(36) : see declaration of 'operator new'
1> D:\studies\Thesis\NTL-Ben-Key\Include\NTL/vector.h(319) : see reference to function template instantiation 'void NTL::BlockConstruct<T>(T *,long)' being compiled
1> with
1> [
1> T=NTL::zz_p
1> ]
1> D:\studies\Thesis\NTL-Ben-Key\Include\NTL/vector.h(291) : while compiling class template member function 'void NTL::Vec<NTL::zz_p>::DoSetLength(long)'
1> D:\studies\Thesis\NTL-Ben-Key\Include\NTL/vector.h(115) : see reference to function template instantiation 'void NTL::Vec<NTL::zz_p>::DoSetLength(long)' being compiled
1> D:\studies\Thesis\NTL-Ben-Key\Include\NTL/vec_lzz_p.h(14) : see reference to class template instantiation 'NTL::Vec<NTL::zz_p>' being compiled
1> MyTest.cpp
1>MyTest.cpp(4): error C2065: 'GF2X' : undeclared identifier
1>MyTest.cpp(4): error C2146: syntax error : missing ';' before identifier 'P'
1>MyTest.cpp(4): error C2065: 'P' : undeclared identifier
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
这真的很简单,我没想到我错过了什么 .
1 回答
从NTL / include / NTL / tools.h:
因此,当预处理器遇到
NTL_OPEN_NNS
时,就像包含文件GF2X.h中的情况一样,它将它扩展为namespace NTL
,这意味着GF2X类被声明为命名空间NTL . 为了使用它,您需要完全限定它为NTL::GF2X
或使用using namespace NTL
来讨论哪一个看起来像here . 同样在扩展NTL_CLOSE_NNS后,在GF2X.h结束时有一个结束括号