Can I create a new operator in C++ and how?

Question

MATLAB arrays support matrix operations and element operations. For example, M*N and M.*N. This is a quite intuitive way to distinguish ‎the two di

Answer 1

You cannot overload .* (see Lightness' answer for standard text), but, interestingly enough, you can overload ->* (similar to how you can overload -> but not .). If that's sufficient for differentiation, then have at it:

struct Int {
    int i;

    Int operator*(Int rhs) const { return Int{i * rhs.i}; }
    Int operator->*(Int rhs) const { return Int{i + rhs.i}; }

    friend std::ostream& operator<<(std::ostream& os, Int rhs) {
        return os << "Int(" << rhs.i << ')';
    }
};

int main() {
    Int five{5};
    Int six{6};

    std::cout << (five * six) << ", " << (five ->* six) << '\n';
}

That'll print Int(30), Int(11).