我正在努力编写一个程序,以最大化买卖股票的利润.我试图检查下一个索引中的值是否大于当前索引位置中的值,但是我的循环导致数组超出范围.它出现在这一行 if((shares [i])<(shares [i + 1]).)防止这种情况的最佳方法是什么.
编辑:我已经获得了股票价格清单.我每天都可以购买或出售买入或卖出.我的方法是找出股价的平均值.如果价格低于平均价格那么"买入"如果接下来的几天价格仍然低于"买入".反之亦然.如果数字大于平均值然后卖出,如果之后的日子仍然更大,那么持有销售.理想情况下,股票[9]我将以4欧元和股票[11]购买,我将以19欧元的价格出售.然而,当它试图检查股票之后的下一个指数时,检查是否出售或结束数组越界[11].
public static void main(String[] args)
{
int [] shares ={3,7,4,2,10,11,8,5,4,8,19};
int average= 0;
int buyOrSell = 0;
int profit = 0;
for(int i = 0; i< shares.length; i++)
{
average += shares[i];
}
average /= shares.length;
System.out.println(average);
for(int i = 0; i < shares.length; i++)
{
if((shares[i] <= average) && (buyOrSell == 0))
{
if((shares[i]) < (shares[i+1]))
{
System.out.println("Buy" + shares[i]);
buyOrSell++;
System.out.println("Profit: " + (profit -= shares[i]));
}
else System.out.println("Hold Buy" + shares[i]);
}
if(shares[i] >= average && buyOrSell == 1)
{
if((shares[i]) > (shares[i+1]))
{
System.out.println("Sell" + shares[i]);
buyOrSell--;
System.out.println("Profit: " + (profit += shares[i]));
}
else System.out.println("Hold Sell" + shares[i]);
}
}
System.out.println("Profit: "+ profit);
}
感谢Gambs解决方案,我添加了这个if语句来解决我的问题.
if((i == shares.length -1) && buyOrSell == 1 && (shares[i] >= average))
{
System.out.println("Sell" + shares[i]);
buyOrSell--;
System.out.println("Profit: " + (profit += shares[i]));
break;
}