Map练习2—Primer1132

/*************************************************************************
    > File Name: main1131.cpp
    > Author:keson
    > Mail:[email protected]
    > Created Time: 2014年11月01日 星期六 12时19分48秒
 ************************************************************************/

#include<iostream>
using namespace std;
#include<map>
#include<string>
#include<vector>
multimap<string,vector<string>> authors;
void Authors_Set();
void Authors_Print();
void Authors_Erase();
int main()
{
    Authors_Set();
    Authors_Print();
    Authors_Erase();
    Authors_Print();
    return 0;
}
void Authors_Set()
{
    cout<<"Enter the number of authors: "<<endl;
    int num=0;
    cin>>num;
    vector<vector<string>> vec1(num);                  //初次设定vector大小，为了下面的下标操作不溢出,vector元素是vector<string>，用来保存每个作者的书

    for(int i=0;i!=num;++i)
    {
        cout<<"Enter the name of the author and books:"<<endl;
        string name;
        string book;
        cin>>name;
        while(cin>>book)
        {
           vec1.at(i).push_back(book);               //对vec1容器中的vector对象插入对应的string
        }
     

        authors.insert(make_pair(name,vec1[i]));     //插入string和对应的vector对象到multimap
        
       
        //为了防止ctrl+影响下次的cin读入
        cin.clear();                                //更改cin的状态标示符
        cin.sync();                                 //清除缓存区的数据流的
    }
}
void Authors_Erase()
{
    cout<<"Enter the name of author you want to erase:"<<endl;
    string s;
    cin>>s;
    auto n=authors.erase(s);
    cout<<"ERASE OK"<<endl;
}
void Authors_Print()
 {
     for(auto &c:authors)
    {
        cout<<c.first<<" ";
        for(auto &b:c.second)
        {
            cout<<b<<" ";
        }
        cout<<endl;
    }
}