Win a copy of Re-engineering Legacy Software this week in the Refactoring forum
or Docker in Action in the Cloud/Virtualization forum!

# Calculate a tree

Terence hiu
Ranch Hand
Posts: 36
Say i have a tree structure created in java

root= +
root left node = +
rood right node = 4
root left of left =2
root left of right =3

(2+3)+4

how would i calculate this tree?

Henry Wong
author
Marshal
Posts: 20902
76
Terence hiu wrote:Say i have a tree structure created in java

root= +
root left node = +
rood right node = 4
root left of left =2
root left of right =3

(2+3)+4

how would i calculate this tree?

If I were to do it, I would choose to do it recursively. Encountering a number would be the base condition, where the number is simply returned. Encountering an operator will trigger two recursive calls to get the operands which will be needed to calculate the value to be returned.

Henry

Terence hiu
Ranch Hand
Posts: 36
Henry Wong wrote:
Terence hiu wrote:Say i have a tree structure created in java

root= +
root left node = +
rood right node = 4
root left of left =2
root left of right =3

(2+3)+4

how would i calculate this tree?

If I were to do it, I would choose to do it recursively. Encountering a number would be the base condition, where the number is simply returned. Encountering an operator will trigger two recursive calls to get the operands which will be needed to calculate the value to be returned.

Henry

Thankyou, problem solved