Cross-correlation sequences x and y without using xcorr(x,y)

Cross-correlation measures the similarity between x and shifted (lagged) copies of y as a function of the lag.

Enter x
[1 1 2 3 4]
Enter the lower limit:
-1
Enter the upper limit:
3
Enter h:
[1 3 5 7 9 2 4 6 8]
Enter the lower limit:
-2
Enter the upper limit:
6
x(n) is:
1 1 2 3 4

z(n) is:
8 6 4 2 9 7 5 3 1

y(n) is:
8 14 26 42 69 56 52 57 71 50 31 15 4