#include<iostream>
 18 using namespace std;
 17
 16 class Date {
 15     private:
 14         int x;
 13     public:
 12         Date(int value) : x(value) { }
 11         void friend PrintDate(Date &d);
 10 };
  9
  8 void Date::PrintDate(Date &d) {
  7     printf("x = %d\n", d.x);
  6 }
  5
  4 int main() {
  3     Date d1(1);
  2     printDate(d1);
  1     return 0;
  0 }