Complex Number Calculator in C++

[Roc]

Hi,everyone
I have to write a calculator which can + , - , * , / , + = ,- = , * = , /= ,++,-- do this operations with operator overloading

#include<iostream>

using namespace std;

class complexNumber
{
private:
    double realPart;
    double imaginaryPart;
public:
    complexNumber(){realPart=0.0; imaginaryPart=0.0;}
    ~complexNumber(){cout<<"Destructor do it's work..!"<<endl;}

    double get_real(){return realPart;}
    double get_imaginary(){return imaginaryPart;}

    void set_real(double r){realPart=r;}
    void set_imaginary(double i){imaginaryPart=i;}

    complexNumber operator+(const complexNumber& c);
    complexNumber operator-(const complexNumber& c);
    
};
void main()
{
    complexNumber c1,c2,c3;
    c1.set_real(3.4);
    c1.set_imaginary(4.5);
    c2.set_real(5.6);
    c2.set_imaginary(6.2);
    c3= c1 + c2;
    cout<< c1 <<endl<< c2 <<endl<< c3 <<endl;

}

i wrote that code according to some topics in this forum but it gives me a error

error C2679: binary '<<' : no operator defined which takes a right-hand operand of type 'class complexNumber' (or there is no acceptable conversion)

How can i fix this?
Also i have to write a display function to print complex numbers according to my code i can not do it please also help me in this problem...

Have a good day...
P.S. i have just registered yet sorry if i did sth wrong...:rolleyes:

[iamthwee]

Hi,everyone
I have to write a calculator which can + , - , * , / , + = ,- = , * = , /= ,++,-- do this operations with operator overloading

#include<iostream>

using namespace std;

class complexNumber
{
private:
    double realPart;
    double imaginaryPart;
public:
    complexNumber(){realPart=0.0; imaginaryPart=0.0;}
    ~complexNumber(){cout<<"Destructor do it's work..!"<<endl;}

    double get_real(){return realPart;}
    double get_imaginary(){return imaginaryPart;}

    void set_real(double r){realPart=r;}
    void set_imaginary(double i){imaginaryPart=i;}

    complexNumber operator+(const complexNumber& c);
    complexNumber operator-(const complexNumber& c);
    
};
void main()
{
    complexNumber c1,c2,c3;
    c1.set_real(3.4);
    c1.set_imaginary(4.5);
    c2.set_real(5.6);
    c2.set_imaginary(6.2);
    c3= c1 + c2;
    cout<< c1 <<endl<< c2 <<endl<< c3 <<endl;

}

i wrote that code according to some topics in this forum but it gives me a error
How can i fix this?
Also i have to write a display function to print complex numbers according to my code i can not do it please also help me in this problem...

Have a good day...
P.S. i have just registered yet sorry if i did sth wrong...:rolleyes:

You haven't defined the methods for operator overloading so what do you expect. Miracles?

The method for overloading the << operator is slightly different. You have to be careful when doing that.

Also this:

c1.set_real(3.4);

should be:

c1.set_real(3,4); <-- separated with a comma.

And exchange void main with int main. Carry on...

[Roc]

The method for overloading the << operator is slightly different. You have to be careful when doing that.

How can i do that?Please give me some code examples?

[iamthwee]

Well without actually handing out the code for a complex number class the following thread should make things clearer.

It's a fraction class but you should get an idea of what you need to do. It can probably simplified as well.

http://www.daniweb.com/techtalkforums/thread44082.html

[Roc]

i have looked that topic but i couldn't get the main idea of overloading "<<" operator...
Can you give me a little code for cout complexNumbers from my code???
This code is working but can not print my complex numbers...
Can you edit this code's "<<" operator for me???or give me an idea please...

#include<iostream>

using namespace std;

class complexNumber
{
private:
    double realPart;
    double imaginaryPart;
public:
    complexNumber(){realPart=0.0; imaginaryPart=0.0;}
    ~complexNumber(){cout<<"Destructor do it's work..!"<<endl;}

    double get_real(){return realPart;}
    double get_imaginary(){return imaginaryPart;}

    void set_real(double r){realPart=r;}
    void set_imaginary(double i){imaginaryPart=i;}

    friend ostream &operator<<( ostream &output, complexNumber &c )
{
   
    return output <<  c.realPart << " / " << c.imaginaryPart;
    
}
    complexNumber operator+(complexNumber c)
    {
    complexNumber temp;
    int temp_realPart,temp_imaginaryPart;
    
    temp_realPart= realPart * c.get_imaginary() + c.get_real()* imaginaryPart;
    temp_imaginaryPart = imaginaryPart * c.get_imaginary();
    
    temp.set_real(temp_realPart);
    temp.set_imaginary(temp_imaginaryPart);
    

    return temp;
}
//    complexNumber operator-(const complexNumber& c);
    
};
int main()
{
    complexNumber c1,c2,c3;
    c1.set_real(3.4);
    c1.set_imaginary(4.5);
    c2.set_real(5.6);
    c2.set_imaginary(6.2);
    c3= c1 + c2;
    cout<<c3<<endl;
    
return 0;
}

[iamthwee]

You've more or less got it. I've just highlighted the stuff I've changed. Now you have to finish the methods for overloading the other operators.

Carry on...

#include<iostream>

using namespace std;

class complexNumber
{
private:
    double realPart;
    double imaginaryPart;
public:
    complexNumber(){realPart=0.0; imaginaryPart=0.0;}
    ~complexNumber(){cout<<"Destructor do it's work..!"<<endl;}

    double get_real(){return realPart;}
    double get_imaginary(){return imaginaryPart;}

    void set_real(double r){realPart=r;}
    void set_imaginary(double i){imaginaryPart=i;}

    friend ostream &operator<<( ostream &output, complexNumber &c )
    {
   
       return output <<  c.realPart << " + " << c.imaginaryPart <<"i";
    
    }
    complexNumber operator+(complexNumber c)
    {
       complexNumber temp;
       double temp_realPart,temp_imaginaryPart;
    
       temp_realPart= realPart  + c.get_real();
       temp_imaginaryPart = imaginaryPart + c.get_imaginary();
    
       temp.set_real(temp_realPart);
       temp.set_imaginary(temp_imaginaryPart);
    
       return temp;
    }
//    complexNumber operator-(const complexNumber& c);
    
};
int main()
{
    complexNumber c1,c2,c3;
    c1.set_real(3.4);
    c1.set_imaginary(4.5);
    c2.set_real(5.6);
    c2.set_imaginary(6.2);
    c3= c1 + c2;
    cout<< c3<<endl;
    
    cin.get();
    
return 0;
}

[iamthwee]

Just one last thing. Multiplication and division of complex numbers is non-intuitive. This is how I was told it should be done:-

[IMG]http://img142.imageshack.us/img142/5735/c4um.png[/IMG]

[Roc]

Thanx a lot..!I'm understanding my mistakes now,i just start to write operators if i'll get in trouble,maybe i'll ask sth also...

Thanx for your patience..!

[iamthwee]

I'm just learning this myself. He he.

I hope I not mis-leading you. :lol:

[Roc]

I've finished writing Basic Complex Numbers Calculator thank you very much...!
have a nice day...