в 15:31, 26 мая 2010

2010-05-26T15:31:02Z

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2010-05-26T12:05:35Z

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==Operator Overload Demo==

<source lang="csharp">
#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">
#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>

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Visual C++ .NET/Class/Operator Overload - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия