Compilare: user.c: In function ‘main’: user.c:40:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.c:39:12: warning: unused variable ‘x’ [-Wunused-variable] double x; ^ user.c:44:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.c:46:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lf", &v[i]); ^