8.11.cpp

#include <string>
#include <vector>
#include <iostream>
#include <sstream>
using std::vector;
using std::string;
using std::cin;
using std::istringstream;
using std::getline;

struct PersonInfo {
  string name;
  vector<string> phones;
};

int main() {
  string line, word;
  vector<PersonInfo> people;
  istringstream record;
  while (getline(cin, line)) {
    PersonInfo info;
    record.clear();  // Note this line.
    // The stream must be reset because after reading the first line, the
    // stream's state is end-of-file, and calling `str(someString)` member
    // function will not reset the stream's state. Thus, `clear()` must be
    // called explicitly.
    // However, the `open()` member funtion of `fstream` will automatically
    // reset the stream's state if it succeeds.
    record.str(line);
    record >> info.name;
    while (record >> word)
      info.phones.push_back(word);
    people.push_back(info);
  }

  for (const auto &e : people) {
    std::cout << e.name << ": ";
    for (const auto &p : e.phones)
      std::cout << p << " ";
    std::cout << std::endl;
  }

  return 0;
}