#ifndef STEPPERH
#define STEPPERH
#include <iostream>
using namespace std;

class stepper {
	const void *p;
public:
	stepper(const void *initial_p): p(initial_p) {}
	stepper operator=(const void *new_p) {p = new_p; return *this;}

	template <class T>
	inline void print(const T& t) {cout << t;}

	static void print(unsigned char c) {cout << static_cast<unsigned>(c);}
	static void print(const char *p) {cout << "\"" << p << "\"";}

	template <class T>
	const T& stand()
	{
		cout << p << ": ";
		const T& t = *static_cast<const T *>(p);
		print(t);
		cout << "\n";
		return t;
	}

	template <class T>
	const T& step()
	{
		const T& t = stand<T>();
		++reinterpret_cast<const T *&>(p);
		return t;
	}
};

#endif