// 2020/4/24(金)～25(土)

import java.io.*;

public class TestFileInput {
    public static void main(String[] args) throws Exception {
        System.out.println("\n行列を入力します");
        double[][] matrix;
        if (args.length == 0) {
            System.out.println("ファイル名の指定がありません");
            return;
        } else if (args[0].equals("-i") && args.length == 2) {
            matrix = readFile(args[1]);
        } else {
            return;
        }
    }

    public static double[][] readFile(String fileName) throws Exception {
        FileReader fr = new FileReader(fileName);
        BufferedReader br = new BufferedReader(fr);
        String line = null;
        int lineCount = 0;
        String[] lineArray = null;
        while((line = br.readLine()) != null) {
            if (lineCount == 0) {
                lineArray = line.split("[ ]");
            }
            lineCount++;
        }
        br.close();
        double[][] matrix = new double[lineArray.length][lineCount];

        fr = new FileReader(fileName);
        br = new BufferedReader(fr);
        line = null;
        int lineNum = 0;
        String[][] lineTable = new String[lineArray.length][lineCount];
        while((line = br.readLine()) != null) {
            lineTable[lineNum] = line.split("[ ]");
            lineNum++;
        }
        for (int i = 0; i < lineArray.length; i++) {
            for (int j = 0; j < lineCount; j++) {
                matrix[i][j] = Double.parseDouble(lineTable[i][j]);
                System.out.print(matrix[i][j] + " ");
            }
            System.out.println();
        }
        br.close();
        return matrix;
    }
}