Compilare: user.c: In function ‘openFile’: user.c:24:5: warning: return makes pointer from integer without a cast [enabled by default] return 1; ^ user.c:15:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file, "%i%i%i", N, H, U); ^ user.c:18:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file, "%i", &h[i]); ^ user.c:19:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file, "%i", &w[i]); ^