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#include <iostream>
#include <vector>
using namespace std;
 
class Tiles {
 public:
  void AddTile(int x) { tiles_.push_back(x); }
  std::vector<int> tiles_;
};
 
class TilesWithData : public Tiles {
 public:
  void AddTile(int x, double data) { 
    tiles_.push_back(x);
    data_.push_back(data);  
  }
  std::vector<double> data_;
};
 
int main() {
	Tiles a; 
	a.AddTile(10); 
 
	TilesWithData b; 
	b.AddTile(20, 12.5);
	b.AddTile(30);
	return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:26:14: error: no matching function for call to ‘TilesWithData::AddTile(int)’
  b.AddTile(30);
              ^
prog.cpp:13:8: note: candidate: void TilesWithData::AddTile(int, double)
   void AddTile(int x, double data) {
        ^~~~~~~
prog.cpp:13:8: note:   candidate expects 2 arguments, 1 provided

Standard output is empty