Digital Library

1022. Digital Library (30)

A Digital Library contains millions of books, stored according to their titles, authors, key words of their abstracts, publishers, and published years. Each book is assigned an unique 7-digit number as its ID. Given any query from a reader, you are supposed to output the resulting books, sorted in increasing order of their ID's.

Input Specification:

Each input file contains one test case. For each case, the first line contains a positive integer N (<=10000) which is the total number of books. Then N blocks follow, each contains the information of a book in 6 lines:

• Line #1: the 7-digit ID number;
• Line #2: the book title -- a string of no more than 80 characters;
• Line #3: the author -- a string of no more than 80 characters;
• Line #4: the key words -- each word is a string of no more than 10 characters without any white space, and the keywords are separated by exactly one space;
• Line #5: the publisher -- a string of no more than 80 characters;
• Line #6: the published year -- a 4-digit number which is in the range [1000, 3000].

It is assumed that each book belongs to one author only, and contains no more than 5 key words; there are no more than 1000 distinct key words in total; and there are no more than 1000 distinct publishers.

After the book information, there is a line containing a positive integer M (<=1000) which is the number of user's search queries. Then M lines follow, each in one of the formats shown below:

• 1: a book title
• 2: name of an author
• 3: a key word
• 4: name of a publisher
• 5: a 4-digit number representing the year

Output Specification:

For each query, first print the original query in a line, then output the resulting book ID's in increasing order, each occupying a line. If no book is found, print "Not Found" instead.

Sample Input:

3
1111111
The Testing Book
Yue Chen
test code debug sort keywords
ZUCS Print
2011
3333333
Another Testing Book
Yue Chen
test code sort keywords
ZUCS Print2
2012
2222222
The Testing Book
CYLL
keywords debug book
ZUCS Print2
2011
6
1: The Testing Book
2: Yue Chen
3: keywords
4: ZUCS Print
5: 2011
3: blablabla

Sample Output:

1: The Testing Book
1111111
2222222
2: Yue Chen
1111111
3333333
3: keywords
1111111
2222222
3333333
4: ZUCS Print
1111111
5: 2011
1111111
2222222
3: blablabla
Not Found

本题要求哦我们能够通过书名或者关键词等匹配书籍，难点在于如何读取并存储给定的信息。

我的做法是：

先用getline()函数读取每一行的字符串

对于key word，我们用stream流再次读取该行字符串，通过空格将每一个keyword存储在数组中

头文件：

可以使用sort()函数对vector进行排序，默认为升序

降序则添加greater参数sort(bookID[i].begin(),bookID[i].end(),greater())，需要包含头文件

#include 
#include 
#include 
#include 
#include 

#include 
#include 

using namespace std;

struct Book {
	vector > label;
	Book() {
		label.resize(6);
	}
};

int main() {
	int n, m;
	cin >> n;
	getchar();//skip the enter after 'n' otherwise the getline() while get the '/n'in the first line with 'n';
	vector books(n);
	string ID, title, author, wordlist, publisher, year;
	string keyword;
	for (int i = 0;i < n;i++) {
		getline(cin, ID);
		getline(cin, title);
		getline(cin, author);
		getline(cin, wordlist);
		getline(cin, publisher);
		getline(cin, year);
		books[i].label[0].push_back(ID);
		books[i].label[1].push_back(title);
		books[i].label[2].push_back(author);
		istringstream istr(wordlist);
		while (!istr.eof()) {
			istr >> keyword;
			books[i].label[3].push_back(keyword);
		}
		books[i].label[4].push_back(publisher);
		books[i].label[5].push_back(year);

	}
	cin >> m;
	vector label(m);
	vector search(m);
	for (int i = 0;i < m;i++) {
		cin >> label[i];
		getchar();
		getchar();
		getline(cin, search[i]);
	}

	vector found(m, false);
	vector > bookID(m);
	for (int i = 0;i < m;i++) {
		for (int j = 0;j < n;j++) {
			for (int k = 0;k < books[j].label[label[i]].size();k++) {
				if (search[i] == books[j].label[label[i]][k]) {
					bookID[i].push_back(books[j].label[0][0]);//push the id of the matched book
					found[i] = true;
				}
			}
		}
	}

	for (int i = 0;i < m;i++) {
		cout << label[i] << ": " << search[i] << endl;
		if (found[i]) {
			sort(bookID[i].begin(), bookID[i].end());//sort the book ID ascending
			for (int j = 0; j < bookID[i].size(); j++) {
				cout << bookID[i][j] << endl;
			}
		}
		else
			cout << "Not Found" << endl;
	}
	system("pause");
	return 0;
}