August 2017
Intermediate to advanced
360 pages
8h 35m
Chinese
Content preview from 算法技术手册（原书第2 版）
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196
｜
第
7
章
7.9.3 解决方案
例
7-8
：
A*
搜索实现
public Solution search (INode initial, INode goal) {
//
从初始状态开始。
int type = StateStorageFactory.PRIORITY_RETRIEVAL;
INodeSet open = StateStorageFactory.create (type);
INode copy = initial.copy();
scoringFunction.score (copy);
open.insert (copy);
//
使用
Hastable
存储已经访问过的状态。
INodeSet closed = StateStorageFactory.create (StateStorageFactory.HASH);
while (!open.isEmpty()) {
//
删除评估值最小的结点，并标记为已访问。
INode best = open.remove();
//
如果是目标状态，返回。
if (best.equals (goal)) { return new Solution (initial, best); }
closed.insert (best);
//
计算后继走法，更新开集和闭集。
DepthTransition trans = (DepthTransition) ...
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