Question

当前正在为import os.path def root_relative_path(root : str, path : str) -> str: return (os.path.join(root, os.path.join(os.sep, os.path.normpath(path)).split(os.sep)[1:])))编写Java程序。我试图从Tomasulo's Algorithm数组中提取一个数字，将其设置为单词。

这是从一个看起来像这样的文本文件中读取的：

multidimensional

前两行会绕开其他内容，但之后我希望将每行的第一个数字设置为诸如10 7 0 2 2 1 0 3 3 2 0 4 2 3 2 5 2 4 2 6 3 5 3 7 3 4至'0'，{{1 }}至'add'，'1'至'sub'和'2'至'mult'

我该怎么办？

'3'

Answer 1

我可能会使用switch语句来处理此问题，因为您最多只能处理10个可能的结果（0-9）。在每种情况下，我都将转换后的值存储在单独的String数组中，该数组可以通过文件中的行数进行索引。以下程序应注意所有事项，包括尾随数字的存储：

更新：该程序实际上与其他提交程序非常相似，但应该可以回答整个问题

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

public class TomasuloAlgorithimDriver {

    public static void main(String[] args) throws FileNotFoundException {
        File file = new File("C:/PathToFile/File.txt");
        Scanner scanInt = new Scanner(file);
        String line = "";
        int cycle = 0;

        //Initializations are specific to your example
        String[] convertedFirstNums = new String[6];
        int[][] nums = new int[8][3];

        while (scanInt.hasNextLine()) {
            line = scanInt.nextLine();
            cycle++;
            if(cycle > 2) {//Only executes after first two lines are parsed

                //Grab first integer for conversion
                String firstNum = "" + line.toCharArray()[0];
                convertedFirstNums[cycle-3] = switchInteger(Integer.parseInt(firstNum));

                //Parse the rest of the line, ignoring the first integer
                int ind = 0;
                for(char c : line.substring(1).toCharArray()) {
                    switch(c) {
                    case ' ': //Skip all spaces in the line
                        break;
                    default: //Take following integers and saves them to num array
                        String num = "" + c;
                        nums[cycle-1][ind] = Integer.parseInt(num);
                        ind++;
                        break;
                    }
                }

            } else {
                //Pick up first two lines 
                nums[cycle-1][0] = Integer.parseInt(line);
            }
        }

        scanInt.close();

        for(int i=0; i < nums.length; i++) {
            if(i < 2) //Print first two numbers from first two lines
                System.out.printf("%d\n", nums[i][0]);  
            else {
                System.out.print(convertedFirstNums[i-2] + " : ");
                for(int j=0; j < nums[i].length; j++) {
                    System.out.printf("%d ", nums[i][j]);
                }
                System.out.println();
            }
        }

    }

    public static String switchInteger(int i) {
        switch(i) {
        case 0: return "add ";
        case 1: return "sub ";
        case 2: return "mult";
        case 3: return "div ";
        }
        return "err ";
    }
}

Answer 2

您可以使用字符串数组来代替整数数组，该字符串数组可以根据您从文件中读取的整数值来设置值。

下面是满足您要求的代码：

    public class ArrayTest {
    public static void main(String[] args) throws FileNotFoundException {
        String stringArray[][] = new String[10][4];

        Scanner scanInt = new Scanner(new File("File Path"));
        int n = 0; // for the number of instructions
        int displayCycle = 0; // cycle to be displayed

        if (scanInt.hasNext()) {
            n = scanInt.nextInt(); // number of instructions taken from file
            displayCycle = scanInt.nextInt(); // cycle number taken from file
        }


        for (int i = 0; i < n; i++) {
            for (int j = 0; j < 4; j++) {
                if (scanInt.hasNext()) {
                    stringArray[i][j] = getStringValue(scanInt.nextInt());
                }
            }
        }

        // Printing the data
        for (String[] strArray : stringArray) {
            for (String s : strArray) {
                System.out.print(s+" ");
            }
            System.out.println();
        }
    }

    static String getStringValue(int number) {
        String value = null;
        switch (number) {
            case 0:
                value = "add";
                break;
            case 1:
                value = "sub";
                break;
            case 2:
                value = "mult";
                break;
            case 3:
                value = "div";
                break;
            default:
                value = "";
                break;
        }
        return  value;
    }
}

在多维数组中设置一个等于单词的数字

2 个答案: