c++ primer 5th 习题11.14自己编写的答案

文件 1.cc

#include <string>
#include <iostream>
#include <fstream>
#include <list>
#include <vector>
#include <set>
#include <map>
#include <utility>
#include <cstdlib>
using namespace std;
void print_(map<string,vector<pair<string,string>>> &f);
int main(int argc,char **argv)
{
map<string,vector<pair<string,string>>> family;

string surname;
string name;
string birthday;

ifstream in(argv[1]);

if(!in)
    {
      cout <<"no file." <<endl;
      exit(EXIT_FAILURE);
    }

while(in >> surname && in >> name && in >> birthday)
{
   family[surname].push_back({name,birthday}); 
}
print_(family);

	return 0;

}
void print_(map<s