jiewmeng@JM-PC:/labs/Uni/CS1020/Lab/Lab 0/prob 2$ cat ./matrix1.out 
1
jiewmeng@JM-PC:/labs/Uni/CS1020/Lab/Lab 0/prob 2$ cat ./output/matrix1.out 
1
jiewmeng@JM-PC:/labs/Uni/CS1020/Lab/Lab 0/prob 2$ diff -u ./matrix1.out ./output/matrix1.out 
--- ./matrix1.out	2011-08-13 22:58:45.417019378 +0800
+++ ./output/matrix1.out	2011-07-25 13:45:14.000000000 +0800
@@ -1 +1 @@
-1
+1
jiewmeng@JM-PC:/labs/Uni/CS1020/Lab/Lab 0/prob 2$ diff -c ./matrix1.out ./output/matrix1.out 
*** ./matrix1.out	2011-08-13 22:58:45.417019378 +0800
--- ./output/matrix1.out	2011-07-25 13:45:14.000000000 +0800
***************
*** 1 ****
! 1
--- 1 ----
! 1