Compilare: user.c: In function ‘main’: user.c:24:9: warning: unused variable ‘ki’ [-Wunused-variable] int ki=1; ^ user.c:12:15: warning: unused variable ‘y’ [-Wunused-variable] int i,j,x,y; ^ user.c:12:13: warning: unused variable ‘x’ [-Wunused-variable] int i,j,x,y; ^ user.c:10:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("flip.in","r",stdin); ^ user.c:11:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("flip.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:15:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t[i][j]); ^ user.c:52:15: warning: ‘fi’ may be used uninitialized in this function [-Wmaybe-uninitialized] cs(vi,fi); ^ user.c:52:15: warning: ‘vi’ may be used uninitialized in this function [-Wmaybe-uninitialized]