/in/foo.cc: In function 'int main()':
/in/foo.cc:31:35: warning: unused variable 'l' [-Wunused-variable]
   int temp,xx,yy,tt,valx,valy,x,y,l,x0,y0;
                                   ^
/in/foo.cc:31:37: warning: unused variable 'x0' [-Wunused-variable]
   int temp,xx,yy,tt,valx,valy,x,y,l,x0,y0;
                                     ^
/in/foo.cc:31:40: warning: unused variable 'y0' [-Wunused-variable]
   int temp,xx,yy,tt,valx,valy,x,y,l,x0,y0;
                                        ^