Compilare: user.c: In function ‘calc’: user.c:11:31: warning: unused variable ‘aux’ [-Wunused-variable] int nr = 0, a = v[x], last, aux; ^ user.c:11:25: warning: variable ‘last’ set but not used [-Wunused-but-set-variable] int nr = 0, a = v[x], last, aux; ^ user.c: In function ‘main’: user.c:23:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.c:25:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^