一.程序说明：
主类类名：Drive
参数：
距离distance
用油oil
每升里程数peroil
平均里程数average
测试类名：DriveTest
测试数据：
driver1:
distance:123 oil:12 driver2:
distance:200 oil:26
测试结果： Enter the distance for driver:123
Enter the oil for driver:12
driver1:
distance:123km oil:12L peroil:10.25km
So far,the
average is:10.25km.
Pay attetion:Enter -1 for distance to quit!
二.程序源码：
1.主类源码：
public class Drive
{
private int distance;
private int oil;
private double peroil;
public void setDistance(int
imDistance)
{
distance=imDistance;
}
public int getDistance()
{
return distance;
}
public void setOil(int