class A{
   char* seq;

   public:
      A(std::string seq);
      ~A();
      void printSeq();
};

A::A(std::string& seqstr ){
    this->seq = new char[strlen(seqstr.c_str())+1]();
    strcpy(seq, seqstr.c_str());
 }
A::~A(){
   delete[] this->seq;
}
A::printSeq(){
  for(int i=0; i<strlen(seq);i++){
     std::cout << seq[i];
   }
  std::cout << std::endl;
}

const char *args[] = {"foo", "bar", "blah", "blahblah"};
std::vector<std::string> x(args, std::end(args));
std::vector<A> avec;
for(int i=0;i<x.size(); i++){
   avec.push_back( A( x[i] ) );
   avec[i].printSeq();
}