查找

Question

所以我刚刚完成课堂作业。我们使用顺序和二进制搜索来询问客户他们正在寻找的部件号。然后返回是否找到它，如果找到则返回价格和要求的部件号。所以有2个数组，其中一个用于部件号的整数，一个用于价格的双数组。因此，在顺序和二进制搜索之后查找部件号，我如何获得该部件号的价格？

public class InventoryData 
{
    Scanner input = new Scanner(System.in);

    int[] partNum = new int [200];
    double[] priceArray = new double[200];
    int partsCount = 0;
    int customerPart;
    int partPrice;
    String inventoryPricing;
    double customerPrice;

    public InventoryData(String File)
    {
        inventoryPricing = "file";
    }

    public void loadArrays()
    {
        try
        {
            Scanner infile = new Scanner(new FileInputStream("file"));
            while(infile.hasNext())
            {
                partNum[partsCount] = infile.nextInt();
                priceArray[partPrice] = infile.nextDouble();
                ++partsCount;
            }
            infile.close();
        } 
        catch (IOException ex)
        {
            //If file has problems, set the count to -1
            partsCount = -1;
            ex.printStackTrace();
        }
    }

    public void seqSearch()
    {
        System.out.println("What part number are you looking for?");
        customerPart = input.nextInt();
        for(int i=0; i < partNum.length; i++){
            if(customerPart == partNum[i])
                System.out.println("Sequential search found part" + customerPart);

        }
    }
    public int binarySearch()
    {
        int first = 0;
        int mid=0;
        int last = partsCount - 1;
        boolean found = false;
        System.out.println("What part number are you looking for?");
        customerPart = input.nextInt();

        while(first <= last && !found)
        {
            mid = (last + first) /2;
            if(partNum[mid] == customerPart)
            {
                found = true;
            }
            else if(partNum[mid] < customerPart)
                first = mid +1;
            else 
                last = mid-1;
        }
        if(!found)
        {
            mid = -1;
        }
        return mid;
    }
        public double getPrice()
        {
            return customerPrice; 
        }
}// end of inventory data class

Answer 1

第一个让我提出一些建议：如果你正在学习如何开发应用程序那么没关系，如果你想要推出som产品然后考虑不使用这样的逻辑，考虑到列表越大，迭代所有数组就越难，直到你也许找点东西......

回到你的问题：:)。

你差不多......

for循环中的

需要获取数组价格validates_date :start_on, after: lambda { (DateTime.now - 1.month }, before: lambda { (DateTime.now + 1.month }并获取索引处的元素..

诀窍隐藏在这里：的 priceArray [I]

查找

priceArray

因此您将获得与用户输入相关的价格值...

如何从阵列中获取价格？

1 个答案:

查找