Compilare: user.cpp: In function ‘int main()’: user.cpp:33:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < R_vec.size(); ++i) { ^ user.cpp:20:12: warning: unused variable ‘mx’ [-Wunused-variable] double mx = numeric_limits<double>::min(); ^ user.cpp:21:12: warning: unused variable ‘mi’ [-Wunused-variable] double mi = numeric_limits<double>::max(); ^ user.cpp:22:12: warning: variable ‘prec’ set but not used [-Wunused-but-set-variable] double prec = 0; ^ user.cpp:24:9: warning: unused variable ‘index’ [-Wunused-variable] int index; ^ user.cpp:18:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(iff,"%d %d",&R, &P); ^ user.cpp:27:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(iff, "%lf", &elm); ^