求救！！！作业题，各位大大帮忙
可能有点多，麻烦了！！！我真的很急啊！
1). Product Catalog Search Indexing
1a). Draw the entity-relationship (ER) diagram for a Product Catalog.

Sample Data:

Catalog “A” contains
Category “A1” contains
Products P1 ($1.99), P2 ($2.99), P3 ($3.99), P4 ($4.99)
Category “A2” contains
Category “A21” contains
Products P5 ($5.99), P6 ($6.99)
Category “A22” contains
Products P7 ($7.99), P8 ($8.99)

Catalog “B” contains
Category “B1” contains
Category “B11” contains
Products P1 ($11.99), P2 ($12.99)
Category “B12” contains
Products P3 ($13.99), P4 ($14.99)
Category “B2”
Products P5 ($15.99), P6 ($16.99), P7 ($17.99), P8 ($18.99)

Hints:
•This is NOT a Binary Tree. A Category may contain more than two (2) Child-Categories, and/or more than two (2) Child-Products. For example, Category A1 contains four (4) Products: P1, P2, P3 and P4.
•Prices are “attached to” Category Product combinations. As such, Prices are Category specific. For example, under Catalog A -> Category A1, Product P1 is $1.99. Under Catalog B -> Category B1 -> Category B11, Product P1 is $11.99.
•Product may show up in different Catalogs and Categories. For example, Product P1 shows up under Catalog A -> Category A1, but also shows up under Catalog B -> Category B1 -> Category B11.


1b). Design and implement, in Java / C# / C++, the data structure and algorithm for generating a Product Search Index Table from the Product Catalog.

Sample Input: (Same as the Sample Data in #1a)

Catalog “A” contains
Category “A1” contains
Products P1 ($1.99), P2 ($2.99), P3 ($3.99), P4 ($4.99)
Category “A2” contains
Category “A21” contains
Products P5 ($5.99), P6 ($6.99)
Category “A22” contains
Products P7 ($7.99), P8 ($8.99)

Catalog “B” contains
Category “B1” contains
Category “B11” contains
Products P1 ($11.99), P2 ($12.99)
Category “B12” contains
Products P3 ($13.99), P4 ($14.99)
Category “B2”

Products P5 ($15.99), P6 ($16.99), P7 ($17.99), P8 ($18.99)

Sample Output: Product Search Index Table

Catalog / Category PathProduct NamePrice
A -> A1P1$1.99
A -> A1P2$2.99
A -> A1P3$3.99
A -> A1P4$4.99
A -> A1 -> A21P5$5.99
A -> A1 -> A21P6$6.99
A -> A2 -> A22P7$7.99
A -> A2 -> A22P8$8.99
B -> B1 -> B11P1$11.99
B -> B1 -> B11P2$12.99
B -> B1 -> B12P3$13.99
B -> B1 -> B12P4$14.99
B -> B2P5$15.99
B -> B2P6$16.99
B -> B2P7$17.99
B -> B2P8$18.99

Note: Given Product Name, one can use this table to find all Catalog / Category Paths in O(1) time via a hash table look-up.


[解决办法]
JAVA？
[解决办法]
遍历多叉树，随便找个中文的数据结构书，把上面的伪代码翻译成java/c/c#语言就行了。
[解决办法]