Compilare: user.c: In function ‘main’: user.c:70:36: warning: unused variable ‘nr’ [-Wunused-variable] int R, P, p = 0, j, i, k, old_nr, nr; ^ user.c:70:28: warning: unused variable ‘old_nr’ [-Wunused-variable] int R, P, p = 0, j, i, k, old_nr, nr; ^ user.c:70:25: warning: unused variable ‘k’ [-Wunused-variable] int R, P, p = 0, j, i, k, old_nr, nr; ^ user.c:70:19: warning: unused variable ‘j’ [-Wunused-variable] int R, P, p = 0, j, i, k, old_nr, nr; ^ user.c:70:12: warning: unused variable ‘p’ [-Wunused-variable] int R, P, p = 0, j, i, k, old_nr, nr; ^ user.c:80:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d\n", &R, &P); ^ user.c:82:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lf\n", &val); ^