An operator overloading: binary + and - : operator overload Binary Plus Subtract « Operator Overload « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Operator Overload
3. operator overload Binary Plus Subtract

using System; 
 
class TwoDimension { 
  int x, y;   
 
  public TwoDimension() { 
     x = y = 0; 
  } 
  public TwoDimension(int i, int j) { 
     x = i; 
     y = j;  
  } 
 
  // Overload binary +. 
  public static TwoDimension operator +(TwoDimension op1, TwoDimension op2) 
  { 
    TwoDimension result = new TwoDimension(); 
 
    result.x = op1.x + op2.x; 
    result.y = op1.y + op2.y; 
 
    return result; 
  } 
 
  // Overload binary -. 
  public static TwoDimension operator -(TwoDimension op1, TwoDimension op2) 
  { 
    TwoDimension result = new TwoDimension(); 
 
    /* Notice the order of the operands. op1 is the left 
       operand and op2 is the right. */ 
    result.x = op1.x - op2.x;
    result.y = op1.y - op2.y;  
 
    return result; 
  } 
   
  public void show() 
  { 
    Console.WriteLine(x + ", " + y); 
  } 
} 
 
class MainClass { 
  public static void Main() { 
    TwoDimension a = new TwoDimension(1, 2); 
    TwoDimension b = new TwoDimension(10, 10); 
    TwoDimension c = new TwoDimension(); 
 
    Console.Write("Here is a: "); 
    a.show(); 
    Console.WriteLine(); 
    Console.Write("Here is b: "); 
    b.show(); 
    Console.WriteLine(); 
 
    c = a + b; // add a and b together 
    Console.Write("Result of a + b: "); 
    c.show(); 
    Console.WriteLine(); 
 
    c = a + b + c; // add a, b and c together 
    Console.Write("Result of a + b + c: "); 
    c.show(); 
    Console.WriteLine(); 
 
    c = c - a; // subtract a 
    Console.Write("Result of c - a: "); 
    c.show(); 
    Console.WriteLine(); 
 
    c = c - b; // subtract b 
    Console.Write("Result of c - b: "); 
    c.show(); 
    Console.WriteLine(); 
  } 
}

Here is a: 1, 2

Here is b: 10, 10

Result of a + b: 11, 12

Result of a + b + c: 22, 24

Result of c - a: 21, 22

Result of c - b: 11, 12