G ++ 'nullptr' was not declared in this area

Question

I am using gcc-4.7.1 for Windows 8 Release Preview with git - bash.

$ g++ -v Using built-in specs. COLLECT_GCC=c:\Users\nikhil bhardwaj\mingw64\bin\g++.exe COLLECT_LTO_WRAPPER=c:/users/nikhil bhardwaj/mingw64/bin/../libexec/gcc/x86_64-w 64-mingw32/4.7.1/lto-wrapper.exe Target: x86_64-w64-mingw32 Configured with: /home/drangon/work/mingw-w64-dgn/source/gcc/configure --host=x8 6_64-w64-mingw32 --target=x86_64-w64-mingw32 --disable-nls --enable-languages=c, c++,objc,obj-c++ --with-gmp=/home/drangon/work/mingw-w64-dgn/build/for_target -- enable-twoprocess --disable-libstdcxx-pch --disable-win32-registry --prefix=/hom e/drangon/work/mingw-w64-dgn/target --with-sysroot=/home/drangon/work/mingw-w64- dgn/target Thread model: win32 gcc version 4.7.1 20120524 (prerelease) (GCC) 

When I try to compile a small piece of code,

 using namespace std; struct node { int data; node *left, *right; }; node *newNode(int data) { node *node = new (struct node); node->data = data; node->left = nullptr; node->right = NULL; return node; } 

I get this error

 $ g++ -I../includes bst.cpp bst.cpp: In function 'node* newNode(int)': bst.cpp:13:18: error: 'nullptr' was not declared in this sc bst.cpp:14:19: error: 'NULL' was not declared in this scope 

I cannot use either NULL or nullptr , do I need to include some header files?

Answer 1

Try it in C ++ 11 mode:

 g++ -std=c++11 -I../includes bst.cpp