public class Stock1
{
public static int maxProfit(int prices[])
{
int min = Integer.MAX_VALUE; // 最小的谷值
int val = 0; //最大的利润
for (int i = 0; i < prices.length; i++)
{
// 比最小值小
if (prices[i] < min )
{
min = prices[i];// 把当前最小值赋值
}
// 比最小值大
else if (prices[i] - min > val )
{
val = prices[i] - min ;// 当前比最小值大,得出差值如果大于最大获利,就复制
}
}
return val ;
}
public static void main(String[] args)
{
int[] prices = { 7, 1, 5, 3, 6, 4 };
int[] prices1 = { 1, 2, 3, 4, 5 };
int[] prices2 = { 7, 6, 4, 3, 1 };
int[] prices3 = { 7, 6, 8, 3, 5, 6, 1 };
// System.out.println(maxProfit2(prices));
// System.out.println(maxProfit2(prices1));
// System.out.println(maxProfit2(prices2));
System.out.println(maxProfit(prices3));
}
}