sudoku.cpp: In function 'int main()': sudoku.cpp:78: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x sudoku.cpp:78: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x sudoku.cpp: In function 'void bkt(int)': sudoku.cpp:108: warning: 'lin' may be used uninitialized in this function sudoku.cpp:108: warning: 'col' may be used uninitialized in this function