Question

how do i: Write a program to input 2 numbers, first and diff. The program will then create a two-dimensional array of 4x4 in an arithmetic sequence which is printed out.
For example, if first is 21 and diff = 5, the arithmetic sequence will be:
21 26 31 36
41 46 51 56
61 66 71 76
81 86 91 96

Answer 1

And then how do i reverse the diagonals? eg.


96 26 31 81
41 71 66 56
61 51 46 76
36 86 91 21

Answer 2

in java

Answer 3

Here's one way you could do it:

for(int i = 0;i<4;i++)
{
for(int j = 0; j<4; j++)
{
if (i==j) { output[i][j] = first + (diff * ( ((3-i) * 4) + (3-j) ); }
else { output[i][j] = first + (diff * ((i * 4) + j) ); }
}

}