Compilare: user.cpp: In member function ‘void nrx_hash::insert_value(int)’: user.cpp:24:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < my_hash[position].size(); i ++ ) { ^ user.cpp: In member function ‘void nrx_hash::erase_value(int)’: user.cpp:40:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < my_hash[position].size(); i ++ ) { ^ user.cpp: In member function ‘int nrx_hash::count_value(int)’: user.cpp:59:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < my_hash[position].size(); i ++ ) { ^ user.cpp: In function ‘int main()’: user.cpp:78:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( input_file, "%s %d", String + 1, &M ); ^ user.cpp:82:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( input_file, "%s", Word + 1 ); ^