/in/foo.cc: In function 'int dis(int, int, int)':
/in/foo.cc:89:23: warning: 'ay' may be used uninitialized in this function [-Wmaybe-uninitialized]
         else if(by==ay+1)
                     ~~^~
/in/foo.cc:77:23: warning: 'ax' may be used uninitialized in this function [-Wmaybe-uninitialized]
         if(by==1 && ax==ay)
                     ~~^~~~
/in/foo.cc:91:32: warning: 'by' may be used uninitialized in this function [-Wmaybe-uninitialized]
             return array[bx][by];
                                ^
/in/foo.cc:83:32: warning: 'bx' may be used uninitialized in this function [-Wmaybe-uninitialized]
             return array[bx][by];
                                ^