sudoku.cpp: In function `int ok(int, int)': sudoku.cpp:17: warning: `int a' might be used uninitialized in this function sudoku.cpp:17: warning: `int b' might be used uninitialized in this function sudoku.cpp: In function `void bkt(int)': sudoku.cpp:64: warning: `int gasit' might be used uninitialized in this function