Bonne chance....
118 H:\COURS\INSA\1ere année\C++\Tp2 -CrossRef\crossref.cpp no match for 'operator=' in 'iter3 = (((setNumLigne*)(&(((mapFichiers*)(&iter)->std::_Rb_tree_iterator<_Tp>::operator-> [with _Tp = std::pair<const std::string, mapFichiers>]()) + 4u)->std::map<_Key, _Tp, _Compare, _Alloc>::find [with _Key = int, _Tp = setNumLigne, _Compare = std::less<int>, _Alloc = std::allocator<std::pair<const int, setNumLigne> >](((const int& )((const int*)(&cpt)))))->std::_Rb_tree_iterator<_Tp>::operator-> [with _Tp = std::pair<const int, setNumLigne>]()) + 4u)->std::set<_Key, _Compare, _Alloc>::begin [with _Key = int, _Compare = std::less<int>, _Alloc = std::allocator<int>]()'