except.h

分数类

#ifndef EXCEPT
#define EXCEPT
#include <exception>
#include <iostream.h>


class DivbyZero:public exception  //除数为零时异常
{
public:
	virtual const char *what()const throw()
	{
		return "****错误：除数为零!****";
	}
};

class InputZero:public exception        //分母为零时异常
{
public:
	virtual const char *what()const throw()
	{
		return "****错误：分母为零!****";
	}
};
#endif