Overloading c++ operators int/float(..) - c++

Question

I'm working on operators in C++ now, but i have one problem. Well I'm trying to overloard int/float operators, I have 2 variables in class
class Zespolona{
public:
float re;
float im;
}
I've done all of my operators but when i do
operator int const(){
this->re = (int)this->re;
this->im = (int)this->im;
return *this;
}
then it gets an infinite loop.
My main
int main(){
Zespolona z1;
z1.re = 1.2;
z1.im = 34.9;
z1 = (int)z1;
cout << z1 << endl;
}
What can i do, to get int of two of those variables?

Answer 1

I am not completely sure what you are trying to achieve. I am guessing one of the following two possibilities:
1) Covert the two floats of your class (re, im) into integers:
This is rather simple. Since the two members are public you can access them directly:
#include <iostream>
int main()
{
Zespolona Z1;
Z1.re = 1.2;
Z1.im = 34.9;
std::cout << "Re: " << (int) Z1.re << std::endl;
std::cout << "Im: " << (int) Z1.im << std::endl;
return 0;
}
The output of this program should be:
Re: 1
Im: 34
Note: When you convert a float to an integer everything after the decimal dot is omitted (at least that is the behavior using g++ under Ubuntu).
If you want the two floats to be private or protected you would have to create methods like int GetRe() and int GetIm().
2) Convert the two floats of your class (re, im) into one integer using the integer conversion operator operator int const(). This operator has to return exactly one int. For the following example I decided to return the absolute value (magnitude) of the complex number (since your members are called re and im I am guessing the class is used for complex numbers):
class Zespolona
{
public:
float re;
float im;
operator int const()
{
return (int) sqrt(re*re + im*im);
}
};
int main()
{
Zespolona Z1;
Z1.re = 1.2;
Z1.im = 34.9;
std::cout << "Z1: " << (int) Z1 << std::endl;
return 0;
}
The output should now be:
Z1: 34
Note: Again the correct (float) result 34.92... is converted into the integer 34.
The code you mentioned in your questions returns a reference to your class Zespolona when you try to convert it into int. Thus, the compiler again tries to convert that reference into an int. But all it gets is again a reference to Zespolona, and so on. Hence, you get an infinite loop.