using namespace std;
  struct library
  {
    string bookname;
    string author;
    int bookno;
  };
  int main()
  {
           library *lib=NULL;
           lib=malloc(sizeof(lib)*1);
           lib=(library*)realloc(lib,2);
           cout<<"Enter Book Name: "<<endl;
           getline(cin,lib[i]->bookname);
 }