Error message help?
 

Hello,

when i try to compile this program (it has three parts) I receive an error message that confuses me. Below are the code and error message.

#include <iostream>



using std::cout;

using std::endl;



#include "Complex.h"



int main()

{

        Complex x(2, 3), y(4, 5), z;



        x.printComplex();

        cout << " + ";

        y.printComplex();

        cout << " = ";

        x.add(y);

        x.printComplex();



        cout << '\n';

        x.setComplexNumber(10, 1); //reset Real

        y.setComplexNumber(11, 5); //reset Imaginery

        x.printComplex();

        cout << " - ";

        y.printComplex();

        cout << " = ";

        x.subtract(y);

        x.printComplex();



        cout << '\n';

        x.equal(y);

        cout << endl;



        return 0;

}

#ifndef Complex_H

#define Complex_H



class Complex {

public:

        Complex(double = 0.0, double = 0.0); //default constructor

        Complex Complex::add(Complex &);

        Complex Complex::subtract(Complex &);

        void printComplex(void);

        void setComplexNumber(double, double);

        Complex Complex::equal(Complex &x);

private:

        double realPart;

        double imagineryPart;

}



#endif

#include <iostream>



using std::cout;



#include <Complex.h>



Complex::Complex(double real, double imaginery)

{ setComplexNumber(real, imaginery); }



void Complex::add(Complex &)

{

        realPart += a.realPart;

        imagineryPart =+ a.imagineryPart;

}



void Complex::subtract(Complex &)

{

        realPart -= s.realPart;

        imagineryPart -= s.realPart;

}



void Complex::printComplex(void)

{ cout << '(' << realPart << ", " << imagineryPart << ')'; }



void setComplexNumber(double rp, dounle ip)

{

        realPart = rp;

        imagineryPart = ip;

}



bool Complex::equal(Complex &x) {

        return ((realPart == x.realPart) && 

                (imagineryPart == x.imagineryPart));

}

The error msg says:
C:\IS20\Complex Classes\Complex.cpp(16) : error C2556: 'void __thiscall Complex::add(class Complex &)' : overloaded function differs only by return type from 'class Complex __thiscall Complex::add(class Complex &)'
c:\is20\complex classes\complex.h(10) : see declaration of 'add'
C:\IS20\Complex Classes\Complex.cpp(16) : error C2371: 'add' : redefinition; different basic types
c:\is20\complex classes\complex.h(10) : see declaration of 'add'
C:\IS20\Complex Classes\Complex.cpp(17) : error C2065: 'a' : undeclared identifier
C:\IS20\Complex Classes\Complex.cpp(17) : error C2228: left of '.realPart' must have class/struct/union type
C:\IS20\Complex Classes\Complex.cpp(18) : error C2228: left of '.imagineryPart' must have class/struct/union type
C:\IS20\Complex Classes\Complex.cpp(22) : error C2556: 'void __thiscall Complex::subtract(class Complex &)' : overloaded function differs only by return type from 'class Complex __thiscall Complex::subtract(class Complex &)'
c:\is20\complex classes\complex.h(11) : see declaration of 'subtract'
C:\IS20\Complex Classes\Complex.cpp(22) : error C2371: 'subtract' : redefinition; different basic types
c:\is20\complex classes\complex.h(11) : see declaration of 'subtract'
C:\IS20\Complex Classes\Complex.cpp(23) : error C2065: 's' : undeclared identifier
C:\IS20\Complex Classes\Complex.cpp(23) : error C2228: left of '.realPart' must have class/struct/union type
C:\IS20\Complex Classes\Complex.cpp(24) : error C2228: left of '.realPart' must have class/struct/union type
C:\IS20\Complex Classes\Complex.cpp(30) : error C2061: syntax error : identifier 'dounle'
C:\IS20\Complex Classes\Complex.cpp(33) : error C2065: 'ip' : undeclared identifier
C:\IS20\Complex Classes\Complex.cpp(36) : error C2556: 'bool __thiscall Complex::equal(class Complex &)' : overloaded function differs only by return type from 'class Complex __thiscall Complex::equal(class Complex &)'
c:\is20\complex classes\complex.h(14) : see declaration of 'equal'
C:\IS20\Complex Classes\Complex.cpp(36) : error C2371: 'equal' : redefinition; different basic types
c:\is20\complex classes\complex.h(14) : see declaration of 'equal'


I do not understand what that means. Can anyone help me? Thanks so much, I really appreciate it a lot.

Re: Error message help?
 

Hi, thanks for reading my message. I've changed my code a bit and I get it to compile but the math is wrong.

#include <iostream>



using std::cout;

using std::endl;



#include "Complex.h"



int main()

{

        Complex x;

        Complex y( 3, 4);

        Complex z( 6, 2);



        cout << "x: ";

        x.printComplex();

        cout << "\ny: ";

        y.printComplex();

        cout << "\nz: ";

        z.printComplex();



        x = y + z;

        cout << "\n\nx = y + z:\n";

        x.printComplex();

        cout << " = ";

        y.printComplex();

        cout << " + ";

        z.printComplex();



        x = y - z;

        cout << "\n\nx = y - z:\n";

        x.printComplex();

        cout << " = ";

        y.printComplex();

        cout << " - ";

        z.printComplex();

        cout << endl;





        return 0;

}// end main

#include <iostream>



using std::cout;



#include "Complex.h"



Complex::Complex(double realPart, double imagineryPart)

: real( realPart ),

        imaginery( imagineryPart)

{

        //empty body

}



//addition

Complex Complex::operator+( Complex &operand2) 

{

         return Complex( real + operand2.realPart, 

                imaginery + operand2.imagineryPart );

}//end



//subtraction

Complex Complex::operator-( Complex &operand2) 

{

        return Complex( real - operand2.realPart,

                imaginery - operand2.imagineryPart );

}//end



//display in form (a, b)

void Complex::printComplex() const

{ 

        cout << '(' << realPart << ", " << imagineryPart << ')'; 

}



//equal or not

bool Complex::equal(Complex &x) {

        return ((realPart == x.realPart) && 

                (imagineryPart == x.imagineryPart));

}

#ifndef Complex_H

#define Complex_H



class Complex {

public:

        Complex(double = 0.0, double = 0.0); //default constructor

        Complex Complex::operator+( Complex &);

        Complex Complex::operator-( Complex &);

        void printComplex() const;

        bool Complex::equal(Complex &x);

private:

        double realPart;

        double imagineryPart;

        double real;

        double imaginery;

};



#endif

Could you please look this over and tell me what myself and the debugger are messing up?

Also, how do I make use of the equal function so that it doesn't just sit there?

Thanks for your help.