sort_employers_by_salary.cpp

#include <algorithm>
#include <iostream>
#include <iterator>
#include <string>
#include <vector>

struct Employer {
  std::string firstname;
  std::string lastname;
  double age;
  double salary;
};

std::istream &operator >>(std::istream &in, Employer &e) {
  return in >> e.firstname >> e.lastname >> e.age >> e.salary;
}

std::ostream &operator <<(std::ostream &out, Employer const &e) {
  return out << e.firstname << ' ' << e.lastname << ' ' << e.age << ' ' << e.salary;
}

int main() {
  std::vector<Employer> employers;
  copy(std::istream_iterator<Employer>(std::cin),
       std::istream_iterator<Employer>(),
       back_inserter(employers));
  sort(employers.begin(), employers.end(), [](Employer const &lhs, Employer const &rhs) {
    return rhs.salary < lhs.salary;
  });
  copy(employers.begin(), employers.end(), std::ostream_iterator<Employer>(std::cout, "\n"));
}

Gosha Vasechkin 22 10000
Vasya Pupkin 19 5000
Maria Kushnir 21 7000
Ivan Ivanovich 37 17000
Petr Kuzmenko 31 15000