/in/foo.cc: In function 'int main()':
/in/foo.cc:28:57: warning: 'maxd' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<'('<<maxa<<','<<maxb<<')'<<' '<<'('<<maxc<<','<<maxd<<')'<<endl;
                                                         ^
/in/foo.cc:28:46: warning: 'maxc' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<'('<<maxa<<','<<maxb<<')'<<' '<<'('<<maxc<<','<<maxd<<')'<<endl;
                                              ^
/in/foo.cc:28:25: warning: 'maxb' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<'('<<maxa<<','<<maxb<<')'<<' '<<'('<<maxc<<','<<maxd<<')'<<endl;
                         ^
/in/foo.cc:28:14: warning: 'maxa' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<'('<<maxa<<','<<maxb<<')'<<' '<<'('<<maxc<<','<<maxd<<')'<<endl;
              ^