Compilare: user.cpp: In function ‘int main()’: user.cpp:52:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( a[pos].first.first == k && pos < a.size() && !H.empty() ){ ^ user.cpp: In function ‘void citeste(int&)’: user.cpp:20:41: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( buffer, 1, DIM, fin ); ^ user.cpp:28:41: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( buffer, 1, DIM, fin ); ^ user.cpp: In function ‘int main()’: user.cpp:35:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( buffer, 1, DIM, fin ); ^