Compilare: user.c: In function ‘main’: user.c:11:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.in","r",stdin); ^ user.c:12:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.out","w",stdout); ^ user.c:13:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.c:9:28: warning: ‘dir’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n,m,i,j,x,y,nr,p,u,dir,uc,xx,yy,k; ^ user.c:34:10: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] cy[1]=y; ^ user.c:33:10: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] cx[1]=x; ^