Help!

[acelya]

class MathProcess
{
public:
       
       double GetLogValue(double, double);
       double GetSineValue(double);
       int MultiSumFunc(int,int,int);
private:
        int base,value;
        double x;
        int start,step,upperbound;
        
};

#include <cstdlib>
#include <iostream>
#include <cmath>
#include "MathProcess.h"
using namespace std;

double MathProcess::GetLogValue(double base,double value)
{
       cout<<log10(value)/log10(base)<<endl;
}
double MathProcess::GetSineValue(double x)
{
       cout<<sin(x)<<endl;
       }
int MathProcess::MultiSumFunc(int start,int step,int upperbound)
{
    int k;
    int SumValue=0;
    for(k=start;k<=upperbound;k+=step)
    SumValue+=k;
    cout<<SumValue<<endl;
}

#include <cstdlib>
#include <iostream>
#include <cmath>
#include "MathProcess.h"

int main(int argc, char *argv[])
{
    MathProcess m;
    m.GetLogValue(3,8);
    m.GetSineValue(78);
    m.MultiSumFunc(5,3,30);
        
    system("PAUSE");
    return EXIT_SUCCESS;
}

Hello.I have these codes. How can I add multiplications of two complex numbers in this programme? (create Complex.h class)But they all will be in main.cpp.
for example; (3+4i)*(2+i)=2+11i

[acelya]

 #include <iostream>
#include <string>
using namespace std;

class Complex
{
      friend ostream &operator<<( ostream &,  Complex& );
      friend istream &operator>>( istream &,  Complex& );
      public:
      Complex(double re,double im):real(re),imag(im)
      {}
      Complex operator+(const Complex& c1)
      {
             double rpart=c1.real+real;
             double ipart=c1.imag+imag;
             return Complex(rpart,ipart);
      }    
      Complex operator-(const Complex& c1)
      {
             double rpart=c1.real-real;
             double ipart=c1.imag-imag;
             return Complex(rpart,ipart);
      }     
      Complex operator*(const Complex& c1)
      {
             double rpart=real*c1.real-imag*c1.imag;
             double ipart=real*c1.imag+imag*c1.real;
             return Complex(rpart,ipart);
      }     
     
     
int real,imaginary,a;
      double showReal()
      {
             return real;
      }  
      double showImag()
      {
             return imag;
      }       
      private:
              double real;
              double imag;      
};

 #include <cstdlib>
#include <iostream>
#include "Complex.h"
using namespace std;

ostream &operator<<( ostream &out, Complex &c ){
    out<<"RealPart: "<<c.real<<"+("<<c.imag<<").i"<<endl;    
    return out;
}

istream &operator>>( istream &in, Complex &c ){
    cout<<"Enter Real Part: "<<endl;
    in>>c.real;   
    cout<<"Enter Imaginer Part: "<<endl;
    in>>c.imag;    
    return in;
}

int main(int argc, char *argv[])
{
    Complex a(0,0),b(0,0);
    cin>>a>>b;
    Complex c=a*b;
   
    cout<<c;
    
    
   // Complex a(1,2),b(2,-3);    
    //Complex c= a*b;
   
    
    system("PAUSE");
    return EXIT_SUCCESS;
}


 

These are codes of multiplications of two complex numbers, but I don't know where I must put these codes in this project? Is there anybody who can help me?

[Ispil]

Well, that depends- where do you want them? I assume under the class Mathprocess?

[acelya]

It is not enough for me to understand it. When I write them in the programme, it is constantly wrong

[Ispil]

Could you post the full program please? I need to be able to see where you want the complex multiplication function- whether you want it under the mathprocess class or perhaps a child class. However, I believe the issue you may be having is the inclusion of the main() proc when you add it to your other code- be sure to get rid of main() {...} from the complex multiplication proc before you add it to your other program, or else it will not work.

[acelya]

I want it under the mathprocess class.

[Ispil]

In that case, make the class Complex a child class of MathProcess. The second snippet of code that you put for the class Complex is unnecessary- that's just the code to run it. The first part of the code is the class itself, which is what you want to put into MathProcess.

[acelya]

How can I make a child class ? Could you use codes in order to I can understand it. I'm new learning C++ and it is very hard to me.

[TheIdeasMan]

Why should complex be derived from MathProcess? Which of the inherited functions or variables from MathProcess is useful for the complex class?

You already have the code for the * operator in the complex class - why do you need to do any thing differently?

You could just have a class for each type of math process, then create an object of a particular type as required. Then call which ever function is needed.

You might not need a MathProcess class at all.

Hope all goes well.