C++ STL map A1022. Digital Library(30) (注意字符串的读入)

#include <bits/stdc++.h>
#include<math.h>
#include <string>
using namespace std;
//5个map变量分别建立书名，作者，关键词，出版社及出版年份与id的映射关系
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");
    }else{
        for(set<int>::iterator it = mp[str].begin();it != mp[str].end();++it){
            printf("%d\n",*it);
        }
    }
}
int main(){
    int n,m,id,type;
    string title,author,key,pub,year;
    scanf("%d",&n);//书的数目
    for(int i =0;i<n;++i){
        scanf("%d",&id);
        char c = getchar();//接收掉id后面的换行
        getline(cin,title);//读入书名title
        mpTitle[title].insert(id);
        getline(cin,author);//读入作者author
        mpAuthor[author].insert(id);
        while(cin>>key){
            mpKey[key].insert(id);
            c = getchar();
            if(c == ‘\n‘){
                break;
            }
        }
        getline(cin,pub);
        mpPub[pub].insert(id);
        getline(cin,year);
        mpYear[year].insert(id);
    }
    string temp;
    scanf("%d",&m);
    for(int i =0;i<m;++i){
        scanf("%d：",&type);
        getline(cin,temp);
        cout<<type<<": "<<temp<<endl;
        if(type == 1){
            query(mpTitle,temp);
        }else if(temp == 2){
            query(mpAuthor,temp);
        }else if(temp == 3){
            query(mpKey,temp);
        }else if(temp == 4){
            query(mpPub,temp);
        }else{
            query(mpYear,temp);
        }
    }
    system("pause");
    return 0;
} 

原文地址：https://www.cnblogs.com/JasonPeng1/p/12205053.html