"ns3/position-allocator.h"

这是一个头文件，属于ns-3网络仿真器中的位置分配器模块。该模块用于在仿真场景中为节点分配位置，以便进行网络拓扑分析和性能评估。在实际的无线网络中，节点的位置会对网络拓扑和传输性能产生重要影响，因此在仿真中准确地模拟节点位置是非常关键的。该头文件中包含了一些用于位置分配的类和函数，如随机位置分配器、网格位置分配器等。

相关问题

deallocate (this=0x2397e038, __p=<optimized out>) at /usr/include/c++/4.8.2/ext/new_allocator.h:110

这是一个C++程序的调试信息，表示在文件/usr/include/c/4.8.2/ext/new_allocator.h的第110行调用了一个名为deallocate的函数，并传入两个参数： this=0x2397e038 和 __p=<optimized out>。

FAILED: MyTestHttp : && /usr/bin/c++ -g CMakeFiles/MyTestHttp.dir/main.cpp.o -o MyTestHttp && : /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::Http()': /home/hy-20/project/MyTestHttp/main.cpp:20: undefined reference to `curl_global_init' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:21: undefined reference to `curl_easy_init' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::~Http()': /home/hy-20/project/MyTestHttp/main.cpp:25: undefined reference to `curl_easy_cleanup' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:26: undefined reference to `curl_global_cleanup' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setUrl(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:29: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setPostFields(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:31: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setMethod(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:35: undefined reference to `curl_easy_setopt' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:36: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setHeaders(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:41: undefined reference to `curl_slist_append' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:42: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setWriteFunction(std::function<void (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)> const&)': /home/hy-20/project/MyTestHttp/main.cpp:46: undefined reference to `curl_easy_setopt' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:47: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::perform()': /home/hy-20/project/MyTestHttp/main.cpp:50: undefined reference to `curl_easy_perform' collect2: error: ld returned 1 exit status ninja: build stopped: subcommand failed.

这是一个链接错误，编译器找不到 curl 库的函数。你需要在链接时加上 curl 库。如果你使用的是 CMake，可以在 CMakeLists.txt 中添加以下代码：

find_package(CURL REQUIRED)
target_link_libraries(YourProjectName ${CURL_LIBRARIES})

其中，YourProjectName 是你的项目名称。