/in/foo.cc: In function 'int main()':
/in/foo.cc:4:19: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'int' [-Wformat=]
  scanf("%d%d",&x,y);
                   ^
/in/foo.cc:4:20: warning: 'y' is used uninitialized in this function [-Wuninitialized]
  scanf("%d%d",&x,y);
                    ^