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  1. #include<iostream>
  2. using namespace std;
  3.  
  4. class V
  5. {
  6. public:
  7.     int vec[2];
  8.     V(int a0, int a1)
  9.     {
  10.         vec[0]=a0;vec[1]=a1;
  11.     }
  12.     V operator++(int dummy)
  13.     {
  14.         V v(vec[0],vec[1]);
  15.         for(int i=0; i<2; i++)
  16.         {
  17.             ++vec[i];
  18.         }
  19.         return v; // Now this is *not* a copy of the incremented value,
  20.                   // but a copy of the *previous* value!
  21.     }
  22.     V operator=(V other)
  23.     {
  24.         vec[0]=other.vec[0];
  25.         vec[1]=other.vec[1];
  26.         return *this;
  27.     }
  28.     void print()
  29.     {
  30.         cout << "(" << vec[0] << ", " << vec[1] << ")" << endl;
  31.     }
  32. };
  33.  
  34. int main(void)
  35. {
  36.     V v1(0,0), v2(1,1);
  37.  
  38.     v1.print();
  39.  
  40.     v1=v2++;
  41.  
  42.     v1.print();
  43. }
Success #stdin #stdout 0s 2852KB
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https://ideone.com/Gz3oi4
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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