Eroare de compilare: user.c: In function ‘main’: user.c:5:31: error: ‘N’ undeclared (first use in this function) for(i=1;((i*i)<<1)+(i<<1)<N;i++) ^ user.c:5:31: note: each undeclared identifier is reported only once for each function it appears in user.c:4:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("divprim.in","r",stdin),freopen("divprim.out","w",stdout),x[++l]=2; ^ user.c:4:44: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("divprim.in","r",stdin),freopen("divprim.out","w",stdout),x[++l]=2; ^ user.c:20:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.c:22:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k),printf("%d\n",s[n][k]); ^