I need an adaptive decision making program with decision tree (no matter which programming language you write in)

1) Decision tree should be about anything. All nodes (except root node) should have priority tags for example after root node, there are 3 internal nodes (2-3-4) and from left to right they have priority tags like 0.9 - 0.8 - 0.7 so system should start searching and calculating from 0.9 because it is greater than the others. You can use any sample if you have or find for writing program, check the example below, either you can use it or use another tree with predefined priority tags by you.

2) System should have simple user interface. User select one of solutions (leaf nodes like 14-15-16-17-18-19-20-21-22) in the example tree. After User selects one of leaf nodes, Our program start searching from root node (1) to selected leaf node (lets say 17) and then Program starts to find best chain according to calculated priority tags and program shows us results like '' Best Chain Results: 1-3-8-17 "

Note: The program is not an Artificial Intelligence system , It is an Adaptive system.

All i need is a simple properly working source code for such system (maybe exactly same for this example) and a proof such as screenshot if possible

0.9 2 0,8 0.9 14 15 16 0.9 0.7 0.8 0.9 0.9 10 0.7 0.9 0.8 0.9 0.8- 17 18 19 12 0.7