Overload for integer + object and object + integer. : overload object and primitive data type « Operator Overloading « C++ Tutorial

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C++ Tutorial » Operator Overloading » overload object and primitive data type 
10.2.1.Overload for integer + object and object + integer.
#include <iostream> 
using namespace std; 
 
class ThreeD 
  int x, y, z; 
public
  ThreeD() { x = y = z = 0
  ThreeD(int i, int j, int k) { x = i; y = j; z = k; 
 
  friend ThreeD operator+(ThreeD op1, int op2)
  friend ThreeD operator+(int op1, ThreeD obp)
 
  void show() 

 
// This allows ThreedD + int 
ThreeD operator+(ThreeD op1, int op2

  ThreeD temp; 
 
  temp.x = op1.x + op2;  
  temp.y = op1.y + op2;  
  temp.z = op1.z + op2;  
  return temp; 

 
// This allows int + ThreedD 
ThreeD operator+(int op1, ThreeD op2

  ThreeD temp; 
 
  temp.x = op2.x + op1;  
  temp.y = op2.y + op1;  
  temp.z = op2.z + op1;  
  return temp; 

 
// Show X, Y, Z coordinates. 
void ThreeD::show() 

  cout << x << ", "
  cout << y << ", "
  cout << z << "\n"

 
int main() 

  ThreeD a(123), b; 
 
  cout << "Original value of a: "
  a.show()
 
  cout << "\n"
 
  b = a + 10// object + integer 
  cout << "Value of b after b = a + 10: "
  b.show()
 
  cout << "\n"
 
  b = 10 + a; // integer + object 
  cout << "Value of b after b = 10 + a: "
  b.show()
 
  return 0
}
Original value of a: 1, 2, 3

Value of b after b = a + 10: 11, 12, 13

Value of b after b = 10 + a: 11, 12, 13
10.2.overload object and primitive data type
10.2.1.Overload for integer + object and object + integer.
10.2.2.+ is overloaded for int + Point
10.2.3.+ is overloaded for Point + int
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