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  1. #include <iostream>
  2. #include <string>
  3. #include <algorithm>
  4. using namespace std;
  5.  
  6. struct person {
  7.     string name;
  8.     int age;
  9. };
  10. typedef person const &person_view;
  11.  
  12. namespace compare_person {
  13.     bool by_age(person_view lhs, person_view rhs) {
  14.         return lhs.age < rhs.age;
  15.     }
  16. }
  17.  
  18. int main() {
  19.     person people[] = {
  20.         {"Jasiek ", 26},
  21.         {"Stasiek", 53},
  22.         {"Piotrek", 16},
  23.         {"Pawel", 19}
  24.     };
  25.  
  26.     sort(people, people + sizeof people / sizeof *people,compare_person::by_age);
  27.  
  28.     for(person_view person: people) {
  29.         cout << person.name << ": " << person.age << "\n";
  30.     }
  31.  
  32.     return 0;
  33. }
Success #stdin #stdout 0s 3416KB
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stdin
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Standard input is empty
stdout
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Piotrek: 16
Pawel: 19
Jasiek : 26
Stasiek: 53
https://ideone.com/s5Lx34
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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