Re: addition of 2 matrix number

From:

Bo Vance <bowman.vance@invalid.invalid>

Newsgroups:

comp.lang.java.help

Date:

Sun, 24 Aug 2008 08:29:46 -0400

Message-ID:

<g8rk93$aoh$1@registered.motzarella.org>

SamuelXiao wrote:

my program is to add 2 matrix number from 2 txt file:

Scanner in1 = new Scanner(System.in);
                        Scanner in2 = new Scanner(System.in);

                        // user input file:
                        String mat1 = in1.next();
                        String mat2 = in2.next();

but it doesn't work, anyone know how to fix it?

import java.io.Console;
import java.util.ArrayList;
import java.util.List;

public class Scratch {

   public static void main(String[] args) {

     Console c = System.console();
     if (c == null) {
         System.err.println("No console.");
         System.exit(1);
     }

     String m1Path = c.readLine("Enter m1 path: ");

     int m1Rows =
       Integer.parseInt(
           c.readLine("Enter m1 number of rows: "));
     int m1Cols =
       Integer.parseInt(
           c.readLine("Enter m1 number of columns: "));

     List<String> m1RowStrings =
       new ArrayList<String>(m1Rows);

     for (int idx = 0; idx < m1Rows; idx++) {
       m1RowStrings.add(c.readLine("Enter m1 row# " + idx));
     }

     String m2Path = c.readLine("Enter m2 path: ");

     int m2Rows =
       Integer.parseInt(
           c.readLine("Enter m2 number of rows: "));
     int m2Cols =
       Integer.parseInt(
           c.readLine("Enter m2 number of columns: "));

     List<String> m2RowStrings =
       new ArrayList<String>(m2Rows);

     for (int idx = 0; idx < m2Rows; idx++) {
       m2RowStrings.add(c.readLine("Enter m2 row# " + idx));
     }

     StringBuilder m1Out = new StringBuilder();
     m1Out.append("m1 path = " + m1Path + "\n");
     m1Out.append("m1 # of rows = " + m1Rows + "\n");
     m1Out.append("m1 # of columns = " + m1Cols + "\n");
     for(String row : m1RowStrings) {
       m1Out.append(row + "\n");
     }
     m1Out.append("\n");

     StringBuilder m2Out = new StringBuilder();
     m2Out.append("m2 path = " + m2Path + "\n");
     m2Out.append("m2 # of rows = " + m2Rows + "\n");
     m2Out.append("m2 # of columns = " + m2Cols + "\n");
     for(String row : m2RowStrings) {
       m2Out.append(row + "\n");
     }
     m2Out.append("\n");

     System.err.print(m1Out);
     System.err.print(m2Out);
   }
}