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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. #define YEAR 1
  6. #define MONTH 2
  7. #define DAY 3
  8.  
  9. int& date(int val)
  10. {
  11.      static int d[3];
  12.      return d[val-1];
  13. }
  14.  
  15. void set_date(int r, int m, int d)
  16. {
  17.      int &x = date(YEAR);      //?
  18.      int f[3] = {r,m,d};
  19.      memcpy((void *)&x, (const void *)f, (sizeof(int)*3));
  20.  
  21.  
  22. }
  23.  
  24. int main()
  25. {
  26.     date(YEAR) = 2013;        
  27.     date(MONTH) = 4;        
  28.     date(DAY) = 1;        
  29.     cout << date(YEAR) << endl;
  30.     cout << date(MONTH) << endl;
  31.     cout << date(DAY) << endl;
  32.     set_date(2000,1,2);
  33.     cout << date(YEAR) << endl;
  34.     cout << date(MONTH) << endl;
  35.     cout << date(DAY) << endl;
  36.  
  37. }
Success #stdin #stdout 0s 3296KB
comments (?)
stdin 
Standard input is empty
stdout 
2013
4
1
2000
1
2
https://ideone.com/kq8PmK
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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