QuickBasic Cafe Forum

I have difficulties in dealing with some matrixes.The problem are : 1.I have a n*n matrix marked as A,and A follows the regularity:if I input n=3,the A should be: 1 0 0 2 6 0 3 4 5 , when n=4,A should be: 1 2  9 3 10  8 4  5   6  7, and when n=5,A= 1 2 12 3 13 11 4 14 15 10 ...