Leka med OO i C (inte C++!)

#include <stdio.h>
#include <stdlib.h>

#define _(obj,func,...) (*((obj).func))(&(obj),__VA_ARGS__)
#define del(ptrToObj) { _(*ptrToObj,del); free(ptrToObj); }

typedef struct MyClass {
	void (*func)(struct MyClass* aThis, int val);
	void (*del)(struct MyClass* aThis);
	void * dynMem;
	int internVal;
} MyClass;

void setVal(MyClass* aThis, int val) {	
	aThis->internVal = val;
	printf("\n Ran some member func, set internVal to: %i", aThis->internVal);
}

void theKiller(MyClass* aThis) {	
	free(aThis->dynMem);
	printf("\n Ran destructor");
}

MyClass * MyClass_cnstr(MyClass * aThis) {
	aThis->internVal = 0;
	aThis->func = &setVal;
	aThis->dynMem = malloc(1);
	aThis->del = &theKiller;
	return aThis;
}

MyClass * new_MyClass() {
	printf("\n Ran dyn alloc constructor");
	return MyClass_cnstr((MyClass *) malloc(sizeof(MyClass)));
}

MyClass _MyClass() {
	MyClass out;
	printf("\n Ran constructor");
	return *MyClass_cnstr(&out);
}

int main() {
	
	MyClass mcStr = _MyClass();
	MyClass * mcPtr = new_MyClass();
	_(*mcPtr, func, 1);
	_(mcStr, func, 2);

	printf("\n mc->internVal: %i", mcPtr->internVal);
	printf("\n mcStr.internVal: %i", mcStr.internVal);
	
	del(mcPtr);
	_(mcStr,del);
	return 0;

}

#define _(obj,func,...) (*((obj).func))(&(obj),__VA_ARGS__)