// This program reads an integer matrix and prints it out.
// It prompts the user for the file name, then reads the file.
// The program assumes that the dimensions of the matrix are
// given by the first two values as number of rows, number of columns.


import java.io.*;
import java.util.*;

public class Matrix {
    public static void main(String[] args)
            throws FileNotFoundException {
        System.out.println("This program will process a series");
        System.out.println("of numbers in the form of a matrix from a file.");
        System.out.println();
        
        Scanner console = new Scanner(System.in);
        System.out.print("What is the file name? ");
        String name = console.nextLine();
        Scanner input = new Scanner(new File(name));
        int[][] m = readMatrix(input);
        
        printMatrix(m);
        
    }
    
    static int[][] readMatrix(Scanner input) {
    	int numRows;
    	int numCols;
    	int [][] matrix;
    	
    	numRows = input.nextInt();
    	numCols = input.nextInt();
    	
    	System.out.println(numRows + " rows to read");
    	System.out.println(numCols + " cols to read");
    	
    	matrix = new int[numRows][numCols];
    	
    	for (int row = 0; row < numRows; row++) {
    		for (int col = 0; col < numCols; col++) {
    			matrix[row][col] = input.nextInt();
    		}
    	}
    	
    	return matrix;
    	
    }
    
    static void printMatrix(int [][] m){
    	for (int r = 0; r < m.length; r++) {
    		for (int c = 0; c < m[r].length; c++) {
    			System.out.print(m[r][c] + " ");
    		}
    		System.out.println();
    	}
    }
}