C ++运算符重载逻辑运算符

Question

Hi I was wondering how I could tackle this problem,

I need to overload +, - and * operators but need to replace them with Logical operators for example;

"+" should use OR

0+0 = 0 , 0+1 = 1, 1+1 = 1 ,1+0 = 1

would i have to place in the overload some sort of if statment?

Any help on how i could do this?

Thanks

They will being using binary as the data type, two matrices with binary as their data

Answer 1

There's no need for an if statement, you just need to return the result of && and || .

struct A
{
   bool val;
   bool operator + (const A& other) { return val || other.val; }
   bool operator * (const A& other) { return val && other.val; }
};

Note that you can't overload operators for built-in types. At least one of the arguments must be user-defined.

Answer 2

You don't want to overload those operators for integers, or any other built-in types, do you? Because it's impossible. If you have your own class which contains a boolean or integer value then the logic goes something like this:

bool operator + (const MyClass& m1, const MyClass& m2) 
{
     return m1.GetMyBooleanMember() || m2.GetMyBooleanMember();
} 

Answer 3

Overloading operator+(int, int) is not possible, however you can create a new type that wraps an int and has the behavior you want...

struct BoolInt
{
   int i;
};

BoolInt operator+(BoolInt x, BoolInt y) { return { x.i || y.i }; }
BoolInt operator*(BoolInt x, BoolInt y) { return { x.i && y.i }; }
BoolInt operator-(BoolInt x, BoolInt y) { return { x.i || !y.i }; } // guessing