Results 1 to 8 of 8
 10032010, 08:26 AM #1Member
 Join Date
 Oct 2010
 Posts
 13
 Rep Power
 0
 10032010, 09:09 AM #2
 Join Date
 Sep 2008
 Location
 Voorschoten, the Netherlands
 Posts
 14,324
 Blog Entries
 7
 Rep Power
 25
 10032010, 09:32 AM #3Member
 Join Date
 Oct 2010
 Posts
 13
 Rep Power
 0
int[][] a=new int[2][2];
int m=0;
int sum=0;
for(int j=0;j<a.length;j++){
for(int k=0;k<a[j].length;k++){
m=m+1;
a[j][k]=m;
System.out.print(a[j][k]+ " ");
sum+=m;
}
System.out.print(" >>> "+ sum);
sum=0;
System.out.println();
}
 10032010, 09:59 AM #4
 Join Date
 Sep 2008
 Location
 Voorschoten, the Netherlands
 Posts
 14,324
 Blog Entries
 7
 Rep Power
 25
It's too bad you've done everything at the same time and in the same method. I prefer a couple of separate methods, one that adds all values in a row of a matrix and one that adds all values in a column of a matrix. Here they are:
Java Code:int addRow(int[][] matrix, int row) { int sum= 0; for (int col= 0; col < matrix[row].length; col++) sum+= matrix[row][col]; return sum; } int addCol(int[][] matrix, int col) { int sum= 0; for (int row= 0; row < matrix.length; row++) sum+= matrix[row][col]; return sum; }
kind regards,
Jos
 10032010, 08:53 PM #5Member
 Join Date
 Oct 2010
 Posts
 13
 Rep Power
 0
Thank u josh! it is beautiful... I created a new class for addRow and addCol and ran it through driver class.. I was just wondering how one could get this kind of idea.. :D
 10032010, 11:23 PM #6Member
 Join Date
 Oct 2010
 Posts
 13
 Rep Power
 0
I thought it worked out good.. but when i tried for 2x3 matrix, it created a problem
created a class for addrow
create a class for colrow
created a drive class
>>AddRow ar=new AddRow();
for(int i=0;i<num.length;i++){
int sumRow = ar.addRow(num, i);
System.out.println("Row"+(i+1)+": "+sumRow);
BUt for colum??
for(int i=0;i<num.length[row];i++){???
i cannot do this?? if i do only num.length[]... this will print out only till 2 columns ,, it is supposed to be 3..
for row it worked out fine..
 10042010, 12:27 AM #7Member
 Join Date
 Oct 2010
 Posts
 13
 Rep Power
 0
Josh Thank you again.. I have figure it out ..
 10042010, 04:33 PM #8
 Join Date
 Sep 2008
 Location
 Voorschoten, the Netherlands
 Posts
 14,324
 Blog Entries
 7
 Rep Power
 25
Similar Threads

Read two matrices from file
By zenitis in forum New To JavaReplies: 13Last Post: 05202010, 03:03 AM 
Counting the number of columns in a 2D array,
By KalEl in forum New To JavaReplies: 9Last Post: 10212008, 05:27 AM 
Two diM aRRay and add rows and columns....
By filly444 in forum New To JavaReplies: 2Last Post: 08302008, 05:24 PM 
How to multiply two matrices
By Java Tip in forum java.langReplies: 0Last Post: 04142008, 08:50 PM 
implementing sparse and nonsparse matrices together
By ishakteyran in forum New To JavaReplies: 0Last Post: 12072007, 09:10 PM
Bookmarks