STL_A1022 Digital Library (30 分)

https://pintia.cn/problem-sets/994805342720868352/problems/994805480801550336

/*
*string,map,set的使用
*map<string,set<int> >
*把字符串string映射到元素均为int且有序的集合set
*/
#include<iostream>
using namespace std;
#include<cstdio>
#include<string>
#include<map>
#include<set>
set<int>::iterator it;
map<string,set<int> >mpTitle,mpAuthor,mpKey,mpPub,mpYear;

void query(map<string,set<int> >& mp,string& str) {
    if(mp.find(str)==mp.end()) printf("Not Found\n"); //注意换行,细节失败!
    else {
        for(it=mp[str].begin();it != mp[str].end();it++) {
            printf("%07d\n",*it); //输出str所对应的全部id
        }
    }
}
int main() {
    int n,m,id,type;
    string title,anthor,key,pub,year;
    scanf("%d",&n);
    for(int i=0;i<n;i++) {
        scanf("%d",&id);
        char c;
        c=getchar();
        getline(cin,title);
        mpTitle[title].insert(id); //把id加入title对应的集合
        getline(cin,anthor);
        mpAuthor[anthor].insert(id);

        while(cin>>key) { //每次读入单个关键词key
            mpKey[key].insert(id);
            c=getchar(); //接收关键词key之后的字符
            if(c==‘\n‘) break; //遇到换行,直接跳出
        }

        getline(cin,pub);
        mpPub[pub].insert(id);
        getline(cin,year);
        mpYear[year].insert(id);
    }
    string temp;
    scanf("%d",&m); //查询次数
    for(int i=0;i<m;i++) {
        scanf("%d: ",&type); //注意输入格式
        getline(cin,temp);
        cout<<type<<": "<<temp<<endl;

        if(type==1) query(mpTitle,temp);
        else if(type==2) query(mpAuthor,temp);
        else if(type==3) query(mpKey,temp);
        else if(type==4) query(mpPub,temp);
        else query(mpYear,temp);
    }
    return 0;
}

原文地址:https://www.cnblogs.com/2o2o/p/11369862.html

时间: 2024-11-09 22:21:59

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