...and overloaded operators

program plus

integer i,j

real x,y

i=3

j=4

x=3.

y=4.

print*, i + j

print*, x + y

end

Here you expect the “ + ” operator to add the 2 numbers, but of course “adding two integers” is quite different from “adding two real numbers”.

This is a trivial overloaded operator.

Wouldn’t it be nice to define some of the following:

• Matrix + Matrix, and int + Matrix

• color + color

• vector + vector

and also

• Matrix * Matrix, and int * Matrix, as well as Matrix * int

• vector * vector

however

• color * color might not be a good metric - but who knows.

In C++, you can actually do that!

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