類別

#include "stdafx.h"
#include <iostream>
using namespace std;


class Car
{
public:
	void init(double, double);
	double getEff() { return eff; }
	double checkgas(){ return gas; }
	double go(double);
private:
	double gas;
	double eff;
};


void Car::init(double G, double E)
{
	gas = G;
	eff = E;
}

double Car::go(double kilo)
{
	if (gas >= (kilo / eff))
	{
		gas -= (kilo / eff);
		cout << "油箱還剩下" << gas << "公升的油" << endl;
		if (gas == 0)
			cout << "沒油了!!" << endl;
	}
	else
	{
		cout << "油不夠了，現在的油只夠跑" << (kilo = gas*eff) << "公里" << endl;
		gas = 0;
	}
	return kilo;
}
int main()
{

	Car super;
	super.init(20, 30);

	cout << "超級省油車1公升的油可跑" << super.getEff()<<"公里"<< endl;
	cout << "油箱還有" << super.checkgas()<<"公升的油" << endl;

	while (super.checkgas() > 0)
	{
		double kilo;
		cout << "現在要開幾公里?" << endl;
		cin >> kilo;
		super.go(kilo);
	}



}