Thread: Two dimensional arrays

Hi there guys, im new to the forum.

Currently a first year programming student, and struggling on arrays as i missed a lecture. Here's what i need to do, and what ive done, before i hit my point of not knowing any more.

Im trying to write a program that will read this data into a 2 dimensional array (data is 1,2,3,4,5,6,7,8,9) so, i've used this

Code:

int arr[3][3]={
               {1,2,3},
               {4,5,6},
               {7,8,9}
               };

then ive used

Code:

int i,j;

	for (i=0;i<3;++i)
   {
   	for(j=0;j<3;++j)
   	printf("%d",arr[i][j]);
      	printf("\n");
   }

to make the program produce the data into a nicely formatted array

1 2 3
4 5 6
7 8 9

Which so far is correct, and working.
Now i need to have the add the value's within the columns, and have them output a lower total, and a side total. What i mean is,

Code:

1   2   3| 6   
4   5   6| 15
7   8   9| 24
==========
12  15  18

Im stumped as to how i do this, and my text book only tells me so much, please, i hope you can help me!

MANY THANKS,

Masschino