#include <cstdio>
#include <cstdlib>

class PhysObject
{
public:
virtual void evaluatePhysics() = 0;
};

class Particle : public PhysObject
{
public:
int position;

void evaluatePhysics()
{
this->position = this->position + 1;
}
};

int main(int argc, const char **argv)
{
        // valid creation of a Particle object on the stack
        Particle newParticle;

        // Test calling ->evaluatePhysics() through a pointer - works
        Particle *newParticlePtr = &newParticle;
        newParticlePtr->evaluatePhysics();
        printf("newParticlePtr position: %d\n", newParticlePtr->position);

        // Malloc some memory the size of a Particle
        Particle *particle = (Particle *)malloc(sizeof(Particle));

        // Copy the valid newParticle into the malloced memory
        // I think this fails because "particle" points to uninitialized memory
        // and the next line needs to invoke the "assignment operator" on
        // the object pointed to by "particle".
        *particle = newParticle;

        // fails :(
        particle->evaluatePhysics();

        return 0;
}