下面是一份计算几何相关代码，本地和洛谷 IDE 可以正常运行，POJ 报 CE：

Main.cc:50: error: ISO C++ forbids declaration of 'vector' with no type
Main.cc:50: error: expected ';' before '<' token
Main.cc: In member function 'void liuzimingc::polygon::add(liuzimingc::point)':
Main.cc:53: error: 'v' was not declared in this scope
Main.cc: In member function 'bool liuzimingc::polygon::include(liuzimingc::point)':
Main.cc:58: error: 'v' was not declared in this scope
Main.cc:59: error: ISO C++ forbids declaration of 'a' with no type
Main.cc:59: error: ISO C++ forbids declaration of 'b' with no type
Main.cc:61: error: request for member 'y' in 'a', which is of non-class type 'const int'
Main.cc:61: error: request for member 'y' in 'b', which is of non-class type 'const int'

代码二楼。