sudoku.cpp: In function 'int main()': sudoku.cpp:48: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x sudoku.cpp:48: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x sudoku.cpp:56: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x sudoku.cpp:56: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x