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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class three_d {
  5.     int x, y, z;
  6. public:
  7.     three_d(int a, int b, int c) {x=a; y=b, z=c; }
  8.     three_d operator+(const three_d& op2) const;
  9.     friend ostream &operator<<(ostream &stream, const three_d &obj);
  10. };
  11. ostream &operator<< (ostream &stream, const three_d &obj)
  12. {
  13.     stream << obj.x << ", ";
  14.     stream << obj.y << ", ";
  15.     stream << obj.z << endl;
  16.     return stream;
  17. }
  18. three_d three_d::operator+ (const three_d &op2) const
  19. {
  20.     return three_d(x + op2.x, y + op2.y, z + op2.z);
  21. }
  22.  
  23. int main()
  24. {
  25.     three_d a(1, 2, 3), b(2, 3, 4), c(3, 4, 5);
  26.     cout << a+b+c << endl;
  27.     return 0;
  28. }
Success #stdin #stdout 0s 2896KB
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stdin
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Standard input is empty
stdout
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6, 9, 12
https://ideone.com/lbD7Y9
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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