Compilare: user.c: In function ‘write’: user.c:134:6: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(fout, "%d", sum); ^ user.c: In function ‘read’: user.c:45:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ user.c:49:16: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &P[ i ].x, &P[ i ].y); ^