PAT 甲级 1022  Digital Library

本文详细解析PAT高级考试中的一道图书查询系统题目,该系统涉及大量图书信息的存储与检索,通过使用STL map实现高效查询。文章不仅提供了解题思路,还附带了完整的代码实现,帮助读者理解如何利用数据结构解决实际问题。

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1022 Digital Library (30 point(s))

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 (≤10​4​​) 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

Experiential Summing-up

This question involves STL map.  It's not difficulty, just a little complex. I think you can solve it completely.

(The purpose of using English to portray my solution is that to exercise the ability of my expression of English and accommodate PAT advanced level's style.We can make progress together by reading and comprehending it. Please forgive my basic grammar's and word's error. Of course, I would appreciated it if you can point out my grammar's and word's error in comment section.( •̀∀•́ ) Furthermore, Big Lao please don't laugh at me because I just a English beginner settle for CET6    _(:з」∠)_  )

Accepted Code

#include <cstdio>
#include <cstring>
#include <algorithm>
#include <vector>
#include <iostream>
#include <string>
#include <map>
using namespace std;
map<string,vector<int> > mp[5];
void print(vector<int> p)
{
	sort(p.begin(),p.end());
	for(int i=0;i<p.size();++i)
		printf("%07d\n",p[i]);
}
void dispose(int f,string str)
{
	if(mp[f].count(str)!=0)
		print(mp[f][str]);
	else
		printf("Not Found\n");
}
int main()
{
	int n,temp,m;
	string str;
	scanf("%d",&n);
	for(int i=0;i<n;++i)
	{
		scanf("%d",&temp);
		getchar();
		getline(cin,str);
		mp[0][str].push_back(temp);
		getline(cin,str);
		mp[1][str].push_back(temp);
		getline(cin,str);
		int pos=0;
		for(int j=0;j<str.size();++j)
		{
			if(str[j]==' ')
			{
				mp[2][str.substr(pos,j-pos)].push_back(temp);
				pos=j+1;
			}
		}
		mp[2][str.substr(pos,str.size()-pos)].push_back(temp);
		getline(cin,str);
		mp[3][str].push_back(temp);
		getline(cin,str);
		mp[4][str].push_back(temp);
	}
	scanf("%d",&m);
	getchar();
	for(int i=0;i<m;++i)
	{
		getline(cin,str);
		printf("%s\n",str.c_str());
		dispose(str[0]-'1',str.substr(3,str.size()-3));
	}
	return 0;
}

 

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