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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#ifndef class
#define class struct
#endif
#ifndef private
#define private
#endif
#ifndef public
#define public
#endif
#ifndef protected
#define protected
#endif
#ifndef bool
#define bool int
#endif
#ifndef true
#define true 1
#endif
#ifndef false
#define false 0
#endif
class Parent{
//private members
private class Parent *this;
private size_t len;
//public members
public size_t (*length)(class Parent *this);
public void (*construct)(class Parent *this);
public void (*print)(class Parent *this);
public void (*destruct)(class Parent *this);
};
class Son{
//private members
private class Son *this;
//inherit
private class Parent *inherit;
//public members
public size_t (*length)(class Son *this);
public bool (*construct)(class Son *this);
public void (*print)(class Son *this);
public void (*destruct)(class Son *this);
};
//forward declaration
void ParentConstruct(class Parent *this);
void ParentPr
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef class
#define class struct
#endif
#ifndef private
#define privat ......