Click here to download c24/llold.cpp.

#include <iostream>

using namespace std;

#define WRITE_LL_CLASS(T) \
class Node_ ## T { \
  public: \
    T data; \
    Node_ ## T * next; \
    Node_ ## T (T d, Node_ ## T * n) :data(d), next(n) { } \
\
    T printAndSum() { \
      cout << data << endl; \
      if (next == NULL) return data; \
      else return data + next->printAndSum(); \
    } \
};

WRITE_LL_CLASS(float)
WRITE_LL_CLASS(int)

int main() {
  Node_float* fhead = NULL;
  Node_int* ihead = NULL;

  float x;
  while (cin >> x) {
    fhead = new Node_float(x, fhead);
    ihead = new Node_int((int)x, ihead);
  }

  cout << "Floating sum: " << fhead->printAndSum() << endl << endl;
  cout << "Int sum: " << ihead->printAndSum() << endl << endl;
  return 0;
}