Compilare: user.cpp: In function ‘int main()’: user.cpp:14:10: warning: unused variable ‘a’ [-Wunused-variable] int n, a, l, u, i, ok; ^ user.cpp:15:10: warning: unused variable ‘max’ [-Wunused-variable] double max, s, st, dr, x; ^ user.cpp:16:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &n, &l, &u); ^ user.cpp:18:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lf", &c[i]); ^ user.cpp:20:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lf", &t[i]); ^