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error in overloaded << and >>

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Join Date: Mar 2007

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MattTobin

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error in overloaded << and >>

Mar 26th, 2007

hello again,
I've run into a problem in overloading << and >>. Within the definition when compiling its saying that 'real' and 'imaginary' are undeclared, these errors are in lines 45(real), 46(imaginary) and 57(both). Whats wrong here? And if you could please let me know how to correct this.

Heres the header file.

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#include <iostream>
using namespace std;
class Complex
{
      public:
            Complex();
            Complex(double real, double imaginary);
            Complex(double real);
            const Complex operator +(const Complex& value) const;
            const Complex operator -(const Complex& value) const;
            const Complex operator -() const;
            const Complex operator *(const Complex& value) const;
            friend ostream& operator <<(ostream& outputStream, const Complex value);
            friend istream& operator >>(istream& inputStream, Complex value);
 
      private:
            double real;
            double imaginary;               
};
#include <iostream>
using namespace std;
class Complex
{
      public:
            Complex();
            Complex(double real, double imaginary);
            Complex(double real);
            const Complex operator +(const Complex& value) const;
            const Complex operator -(const Complex& value) const;
            const Complex operator -() const;
            const Complex operator *(const Complex& value) const;
            friend ostream& operator <<(ostream& outputStream, const Complex value);
            friend istream& operator >>(istream& inputStream, Complex value);
 
      private:
            double real;
            double imaginary;               
};
     Help with Code Tags   C++ Syntax (Toggle Plain Text)    #include <iostream>using namespace std;class Complex{      public:            Complex();            Complex(double real, double imaginary);            Complex(double real);            const Complex operator +(const Complex& value) const;            const Complex operator -(const Complex& value) const;            const Complex operator -() const;            const Complex operator *(const Complex& value) const;            friend ostream& operator <<(ostream& outputStream, const Complex value);            friend istream& operator >>(istream& inputStream, Complex value);       private:            double real;            double imaginary;               }; #include <iostream>
using namespace std;
class Complex
{
      public:
            Complex();
            Complex(double real, double imaginary);
            Complex(double real);
            const Complex operator +(const Complex& value) const;
            const Complex operator -(const Complex& value) const;
            const Complex operator -() const;
            const Complex operator *(const Complex& value) const;
            friend ostream& operator <<(ostream& outputStream, const Complex value);
            friend istream& operator >>(istream& inputStream, Complex value);
 
      private:
            double real;
            double imaginary;               
};  

Here is the .cpp file the errors are actually in.

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#include <iostream>
#include <math.h>
#include <cstdlib>
using namespace std;
#include "Complex.h"
Complex::Complex(): real(0), imaginary(0)
{                   }
Complex::Complex(double realPart, double imaginaryPart): real(realPart), imaginary(imaginaryPart)
{                       }
Complex::Complex(double realPart): real(realPart), imaginary(0)
{                       }
const Complex Complex::operator +(const Complex& secondValue) const
{
      double realSum, imaginarySum;
      realSum = real + secondValue.real;
      imaginarySum = imaginary + secondValue.imaginary;
 
      return Complex(realSum, imaginarySum);
}
const Complex Complex::operator -(const Complex& secondValue) const
{
      double realDiff, imaginaryDiff;
      realDiff = real - secondValue.real;
      imaginaryDiff = imaginary - secondValue.imaginary;
 
      return Complex(realDiff, imaginaryDiff);
}
const Complex Complex::operator -() const
{
      return Complex(-real, -imaginary);
}
// just a reminder that complex multiplication is defined as:
// (a+bi)(c+di) = (ac-bd) + (ad-bc)i.
// [url]http://mathworld.wolfram.com/ComplexMultiplication.html[/url]
const Complex Complex::operator *(const Complex& secondValue) const
{
      double realProduct, imaginaryProduct;
      realProduct = real*secondValue.real-imaginary*secondValue.imaginary;
      imaginaryProduct = real*secondValue.imaginary-imaginary*secondValue.real;
 
      return Complex(realProduct, imaginaryProduct);
}
ostream& operator <<(ostream& outputStream, const Complex& value)
{
      outputStream << real;
      if (imaginary < 0)
         outputStream << "-";
      else
         outputStream << "+";
      outputStream << imaginary << "i";
 
      return outputStream;
}
istream& operator >>(istream& inputStream, const Complex& value)
{
      char sign, i;
      inputStream >> real >> sign >> imaginary >> i;
      if (sign == '-')
          imaginary = -imaginary;
 
      return inputStream;
}
#include <iostream>
#include <math.h>
#include <cstdlib>
using namespace std;
#include "Complex.h"
Complex::Complex(): real(0), imaginary(0)
{                   }
Complex::Complex(double realPart, double imaginaryPart): real(realPart), imaginary(imaginaryPart)
{                       }
Complex::Complex(double realPart): real(realPart), imaginary(0)
{                       }
const Complex Complex::operator +(const Complex& secondValue) const
{
      double realSum, imaginarySum;
      realSum = real + secondValue.real;
      imaginarySum = imaginary + secondValue.imaginary;
 
      return Complex(realSum, imaginarySum);
}
const Complex Complex::operator -(const Complex& secondValue) const
{
      double realDiff, imaginaryDiff;
      realDiff = real - secondValue.real;
      imaginaryDiff = imaginary - secondValue.imaginary;
 
      return Complex(realDiff, imaginaryDiff);
}
const Complex Complex::operator -() const
{
      return Complex(-real, -imaginary);
}
// just a reminder that complex multiplication is defined as:
// (a+bi)(c+di) = (ac-bd) + (ad-bc)i.
// [url]http://mathworld.wolfram.com/ComplexMultiplication.html[/url]
const Complex Complex::operator *(const Complex& secondValue) const
{
      double realProduct, imaginaryProduct;
      realProduct = real*secondValue.real-imaginary*secondValue.imaginary;
      imaginaryProduct = real*secondValue.imaginary-imaginary*secondValue.real;
 
      return Complex(realProduct, imaginaryProduct);
}
ostream& operator <<(ostream& outputStream, const Complex& value)
{
      outputStream << real;
      if (imaginary < 0)
         outputStream << "-";
      else
         outputStream << "+";
      outputStream << imaginary << "i";
 
      return outputStream;
}
istream& operator >>(istream& inputStream, const Complex& value)
{
      char sign, i;
      inputStream >> real >> sign >> imaginary >> i;
      if (sign == '-')
          imaginary = -imaginary;
 
      return inputStream;
}
     Help with Code Tags   C++ Syntax (Toggle Plain Text)    #include <iostream>#include <math.h>#include <cstdlib>using namespace std;#include "Complex.h"Complex::Complex(): real(0), imaginary(0){                   }Complex::Complex(double realPart, double imaginaryPart): real(realPart), imaginary(imaginaryPart){                       }Complex::Complex(double realPart): real(realPart), imaginary(0){                       }const Complex Complex::operator +(const Complex& secondValue) const{      double realSum, imaginarySum;      realSum = real + secondValue.real;      imaginarySum = imaginary + secondValue.imaginary;       return Complex(realSum, imaginarySum);}const Complex Complex::operator -(const Complex& secondValue) const{      double realDiff, imaginaryDiff;      realDiff = real - secondValue.real;      imaginaryDiff = imaginary - secondValue.imaginary;       return Complex(realDiff, imaginaryDiff);}const Complex Complex::operator -() const{      return Complex(-real, -imaginary);}// just a reminder that complex multiplication is defined as:// (a+bi)(c+di) = (ac-bd) + (ad-bc)i.// [url]http://mathworld.wolfram.com/ComplexMultiplication.html[/url]const Complex Complex::operator *(const Complex& secondValue) const{      double realProduct, imaginaryProduct;      realProduct = real*secondValue.real-imaginary*secondValue.imaginary;      imaginaryProduct = real*secondValue.imaginary-imaginary*secondValue.real;       return Complex(realProduct, imaginaryProduct);}ostream& operator <<(ostream& outputStream, const Complex& value){      outputStream << real;      if (imaginary < 0)         outputStream << "-";      else         outputStream << "+";      outputStream << imaginary << "i";       return outputStream;}istream& operator >>(istream& inputStream, const Complex& value){      char sign, i;      inputStream >> real >> sign >> imaginary >> i;      if (sign == '-')          imaginary = -imaginary;       return inputStream;} #include <iostream>
#include <math.h>
#include <cstdlib>
using namespace std;
#include "Complex.h"
Complex::Complex(): real(0), imaginary(0)
{                   }
Complex::Complex(double realPart, double imaginaryPart): real(realPart), imaginary(imaginaryPart)
{                       }
Complex::Complex(double realPart): real(realPart), imaginary(0)
{                       }
const Complex Complex::operator +(const Complex& secondValue) const
{
      double realSum, imaginarySum;
      realSum = real + secondValue.real;
      imaginarySum = imaginary + secondValue.imaginary;
 
      return Complex(realSum, imaginarySum);
}
const Complex Complex::operator -(const Complex& secondValue) const
{
      double realDiff, imaginaryDiff;
      realDiff = real - secondValue.real;
      imaginaryDiff = imaginary - secondValue.imaginary;
 
      return Complex(realDiff, imaginaryDiff);
}
const Complex Complex::operator -() const
{
      return Complex(-real, -imaginary);
}
// just a reminder that complex multiplication is defined as:
// (a+bi)(c+di) = (ac-bd) + (ad-bc)i.
// [url]http://mathworld.wolfram.com/ComplexMultiplication.html[/url]
const Complex Complex::operator *(const Complex& secondValue) const
{
      double realProduct, imaginaryProduct;
      realProduct = real*secondValue.real-imaginary*secondValue.imaginary;
      imaginaryProduct = real*secondValue.imaginary-imaginary*secondValue.real;
 
      return Complex(realProduct, imaginaryProduct);
}
ostream& operator <<(ostream& outputStream, const Complex& value)
{
      outputStream << real;
      if (imaginary < 0)
         outputStream << "-";
      else
         outputStream << "+";
      outputStream << imaginary << "i";
 
      return outputStream;
}
istream& operator >>(istream& inputStream, const Complex& value)
{
      char sign, i;
      inputStream >> real >> sign >> imaginary >> i;
      if (sign == '-')
          imaginary = -imaginary;
 
      return inputStream;
}  

Thank you in advance.

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Ancient Dragon Ancient Dragon is offline

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Re: error in overloaded << and >>

Mar 26th, 2007

line 45 should be like this: (use the value object)
outputStream << value.real;

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.

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Join Date: Mar 2007

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MattTobin

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Re: error in overloaded << and >>

Mar 26th, 2007

ok, i had tried that and then i got an error because real and imaginary are private
/edit
i found it, thx though, in the header the '&' is missing from both << and >> and there is a const in the .cpp file that shouldnt be there. sorry =P

Last edited by MattTobin; Mar 26th, 2007 at 7:29 am.