Compilare: user.cpp: In function ‘double DEI(int, int)’: user.cpp:51:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < pos.size() ; ++i) ^ user.cpp:52:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = i + 1 ; j <= i + 8 && j < pos.size() ; ++j) ^ user.cpp:49:12: warning: unused variable ‘end’ [-Wunused-variable] int j, end; ^ user.cpp: In function ‘int main()’: user.cpp:65:10: warning: unused variable ‘j’ [-Wunused-variable] int i , j ; ^