Visual C++ .NET/Class/Operator Overload

Operator Overload Demo

<source lang="csharp">

1. include "stdafx.h"

using namespace System; ref class MyClass{ public:

   MyClass() : i(0) {}
   MyClass(int x) : i(x) {}
   // x != y
   static bool operator !=(const MyClass ^lhs, const MyClass ^rhs)
   {
       return lhs->i != rhs->i;
   }
   // x * y
   static MyClass^ operator *(const MyClass ^lhs, const MyClass ^rhs)
   {
       MyClass^ ret = gcnew MyClass();
       ret->i = lhs->i * rhs->i;
       return ret;
   }
   // x *= y
   static void operator *=(MyClass ^lhs, const MyClass ^rhs)
   {
       lhs->i *= rhs->i;
   }
   // -x
   static MyClass^ operator -(const MyClass ^lhs)
   {
       MyClass^ ret = gcnew MyClass();
       ret->i = -(lhs->i);
       return ret;
   }
   // ++x and x++
   static MyClass^ operator ++(const MyClass ^lhs)
   {
       MyClass^ ret = gcnew MyClass();
       ret->i = (lhs->i) + 1;
                    
       return ret;  
   }
   virtual String ^ ToString() override
   {
       return i.ToString();
   }

private:

   int i;

}; void main() {

   MyClass ^op1 = gcnew MyClass(3);
   MyClass ^op2 = gcnew MyClass(5);
   MyClass ^op3 = gcnew MyClass(15);
  if ( op1 * op2 != op3)
      Console::WriteLine("not Equal");
  else
      Console::WriteLine("Equal");
   op1 *= op2;
   Console::WriteLine(op1);
   Console::WriteLine(++op1);
   Console::WriteLine(op1++);
   Console::WriteLine(-op1); 
   Console::WriteLine(op1);  

}

 </source>

Relational Operator Overload

<source lang="csharp">

1. include "stdafx.h"

using namespace System; ref class Number { public:

   Number(int x) : i(x) {}
   static bool operator >(Number^ n, int v)  // maps to operator >
   {
       return n->i > v;
   }
   static bool operator >(int v, Number^ n)  // maps to operator >
   {
       return v > n->i;
   }
   virtual String ^ ToString() override
   {
       return i.ToString();
   }

private:

   int i;

};

int main() {

  Number^ n = gcnew Number(5);
  if ( n > 6 )
      Console::WriteLine("{0} Greater than 6", n);
  else
      Console::WriteLine("{0} Less than or Equal 6", n);
  if ( 6 > n )
      Console::WriteLine("6 Greater than {0}", n);
  else
      Console::WriteLine("6 Less than or Equal {0}", n);

}

 </source>