Operator Overloading
This is same as method overloading, where in
method overloading we define multiple behaviors to a method but in the case of
operator overloading we can define multiple behavior to an Operator.
Eg. - ‘+’ is overloaded operator which can be used
for adding numeric’s and concatenating Strings.
In the some way we can overload any existing
operator as per over requirement and use it. To overload an operator we need to
define an operator method as following.
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[< method >] static <type> operator <opt>
(<param def’s >)
{
- stmts
}
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- The operator method are always static, return
type of an operator method will be the same type of parameters which are passed
to the method.
- Add a
class Matrix.cs and write the following:
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class Matrix
{
// variables for a 2*2 matrix
int a, b, c, d;
public Matrix(int a, int b, int c, int d)
{
this.a = a; this.b = b;
this.c = c; this.d = d;
}
// overload + operator to add Two matrixes
public static Matrix operator +( Matrix obj1, Matrix obj2)
{
Matrix m = new Matrix(obj1.a + obj2.a, obj1.b + obj2.b, obj1.c +
obj2.c, obj1.d + obj2.d);
return m;
}
// overload - operator to add Two matrixes
public static Matrix operator - (Matrix obj1, Matrix obj2)
{
Matrix m = new Matrix(obj1.a - obj2.a, obj1.b - obj2.b, obj1.c -
obj2.c, obj1.d - obj2.d);
return m;
}
// overloading ToString () method of object
class to print value of matrix.
public override string ToString()
{
string str = string.Format("[a:{0},b:{1},c:{2},d:{3}]",a,b,c,d);
return str;
}
}
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- Add a
class TestMatrix.cs and write the following:
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class TestMatrix
{
static void
{
Matrix m1 = new Matrix(5, 6, 7, 8);
Matrix m2 = new Matrix(1, 2, 3, 4);
Matrix m3 = m1 + m2;
Matrix m4 = m1 - m2;
Console.WriteLine(m1);
Console.WriteLine(m2);
Console.WriteLine(m3);
Console.WriteLine(m4);
Console.ReadLine();
}
}
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