Compilare: user.c: In function ‘main’: user.c:32:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.c:54:9: warning: ‘yj’ may be used uninitialized in this function [-Wmaybe-uninitialized] drum(1, xj, yj, 1); ^ user.c:54:9: warning: ‘xj’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.c:53:9: warning: ‘yr’ may be used uninitialized in this function [-Wmaybe-uninitialized] drum(0, xr, yr, 1); ^ user.c:53:9: warning: ‘xr’ may be used uninitialized in this function [-Wmaybe-uninitialized]