Re: overloading for multiple arithmetic operations
On 13 July, 23:43, Dominic Chandar <dominic.chan...@gmail.com> wrote:
Hi,
I would like to add multiple objects of a class with integers/
floats. Need some basic help in fixing an error
Eg:
#include<iostream>
using namespace std;
class Test
{
public:
Test(float _code){ code = _code;}
Test(){}
float code;
friend Test operator+(Test & ob, float val);
friend Test operator+(float val, Test & ob);
Test operator+(Test & ob);
};
Short answer: change to take const references.
Longer answer:
The preferred way to do this sort of thing is to provide member Test&
operator +=(XXXXX) and the define all the operator + as free functions
in terms of these.
Secondly rely on constructors wherever possible:
class Test
{
public:
Test(float _code){ code = _code;}
Test(A a) {....}
Test(B b) {....}
....
Test& operator+= (const Test& other) { .... }
};
Test operator+(Test a, cons Test& b) { return a += b; }
This will handle addition of instances of Test,A,B,float in any
combination and only requires a new ctor to add a new type OR,
if you want to freeze Test then new type C can be added by adding 2
free operators without any need to add them as friends provided only
that you can convert them to Test.
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