#ifndef DEF_ZFRACTION

	#define DEF_ZFRACTION
	#include <iostream>
	#include <string>
	
	using namespace std;


	class ZFraction{
		public:
			ZFraction(int a=1, int b=1);


			ZFraction operator+(const ZFraction& x) const;
			ZFraction& operator+=(const ZFraction& x);

			ZFraction operator*(const ZFraction& x) const;
			ZFraction& operator*=(const ZFraction& x) const;

		private:
			friend ostream& operator<<(ostream& o, const ZFraction& f);

			int _a;
			int _b;
	};




	#include "ZFraction.cpp"

#endif