c++ primer 5th 练习11.9自己编写的答案

#include <string>
#include <iostream>
#include <list>
#include <vector>
#include <set>
#include <map>
//stringstream对象需要包含头文件sstream
#include <sstream>
using namespace std;
int main()
{
map<string,list<int>> word_linenumber;
string words;
int number = 0;
string word;
while(getline(cin,words))
  {
       ++ number;
       stringstream in(words);
       while(in >> word)
           word_linenumber[word].push_back(number);
  }
for(const auto & i : word_linenumber)
   {
      cout << i.first << ":";
      for(auto j : i.second)
              cout << j << " ";
      cout << endl;
   }

        return 0;

}

运行结果：

i am a good
boy and you 
are a good boy
too so you are a 
good boy
a:1 3 4 
am:1 
and:2 
are:3 4 
boy:2 3 5 
good:1 3 5 
i:1 
so:4 
too:4 
you:2 4 

总结：list也可以使用push_back()在末尾添加元素