Compilare: user.c: In function ‘main’: user.c:28:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.c:30:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d%d%d%d", &x1[i], &y1[i], &x2[i], &y2[i], &x3[i], &y3[i]); ^ user.c:32:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &x, &y); ^ user.c:54:10: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out, "\n%d", p + 1); ^