//卖水果：10元/千克
public override int Sell(ref int money)
{
if (orchardist == null) orchardist = new Orchardist();
int fruit = money / 10; //卖出的水果数量
//如果水果总量不足则向果农购买水果
if (fruit > this.fruit) this.fruit += this.orchardist.Sell(ref this.money) * 1000;
this.fruit -= fruit; //代理商卖出的水果
this.money += fruit * 10; //代理商的收入
money -= fruit * 10; //购买者支出金额
Console.WriteLine("代理商卖出水果{0}千克，还剩{1}千克水果，收入{2}元！", fruit, this.fruit, fruit * 10);
return fruit; //卖出的水果数量
}
//卖水果：10元/千克
public override int Sell(ref int money)
{
if (orchardist == null) orchardist = new Orchardist();
int fruit = money / 10; //卖出的水果数量
//如果水果总量不足则向果农购买水果
if (fruit > this.fruit) this.fruit += this.orchardist.Sell(ref this.money) * 1000;
this.fruit -= fruit; //代理商卖出的水果
this.money += fruit * 10; //代理商的收入
money -= fruit * 10; //购买者支出金额
Console.WriteLine("代理商卖出水果{0}千克，还剩{1}千克水果，收入{2}元！", fruit, this.fruit, fruit * 10);
return fruit; //卖出的水果数量
}
