CODEWITHSUNDEEP
c++object
Ryan Sayles
Ryan Sayles

Reputation: 3431

Using class objects in functions

I'm new to C++ and I'm trying to make a program to do conversions between two objects. I have Class1, Class2 and Convert. I want a function that takes in a Class1 object, converts it to a Class2 object and returns the Class2 object. Right now my convert class is basically:

Convert.h

#ifndef Convert_H
#define Convert_H
#include "Class1.h"
#include "Class2.h"

class Convert
{
public:
    Convert();
    Class1 c1;
    Class2 c2;
    Class2 C1ToC2(Class1);

};
#endif // Convert_H

Convert.cpp

#include "Convert.h""
#include "Class1.h" 
#include "Class2.h"

Convert::Convert()

Class2 Convert::C1ToC2(Class1 c1)
{
    //conversions

    return c2;
}

I have a few questions about this. I don't want to have the convert functions in the other classes which is why I created a separate class.

  1. Is this a good way to use functions that I don't want to be apart of the other classes
  2. When I compile this class it fails saying "expected initializer before Class2 but since I want to return a Class2 object isn't that how I have to define the function?

Once again I am new to C++, I do have a few books that I'm trying to learn from but they don't really tell how to use objects like this so I apologize if this is a stupid question and I'm doing it completely wrong.

Upvotes: 1

Views: 75

Answers (2)

Daniel Frey
Daniel Frey

Reputation: 56863

In C++, you can simply use a function directly, you don't need a class Convert.

In Convert.h:

#ifndef Convert_H
#define Convert_H

#include "Class1.h"
#include "Class2.h"

// declare the function
Class2 convert( const Class1& input );

#endif

and in Convert.cpp:

#include "Convert.h"

// define the function
Class2 convert( const Class1& input )
{
    Class2 result;
    // do conversion
    return result;
}

Note that this is just the basics, it can be improved in several aspects but it should help you to get started and experiment on your own.

Upvotes: 3

Yoctohan
Yoctohan

Reputation: 121

With regards to your second question, the reason the code doesn't compile is because you forgot the curly braces after Convert::Convert(). (Or maybe a semicolon. But I assume you wanted to define the ctor)

Upvotes: 1

Related Questions