The value of an element `newtemps[i]` in the interior of `
newtemps` will depend upon `oldtemps[i-1]`, `oldtemps[i]`, and
`oldtemps[i+1]` according to our formula for heat propagation.

Once we have completely calculated every entry of `newtemps`, we
need to copy them into `oldtemps` in preparation for the next
round of calculations.

Hamlet Project

Department of Computer Science

University of Utah