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// Pls try the following program on virtual functions and try to do print on
// most of the code in main(). Almost none of them works !
//
// The inheritance structure is:
//
// V : VA VB
// A : (V)
// B : A
// D : AD (V)
// C : (V)
// E : B (V) D C
//
class VA
{
public:
int va;
};
class VB
{
public:
int vb;
int fvb();
virtual int vvb();
};
class V : public VA, public VB
{
public:
int f();
virtual int vv();
int w;
};
class A : virtual public V
{
public:
virtual int f();
private:
int a;
};
class B : public A
{
public:
int f();
private:
int b;
};
class C : public virtual V
{
public:
int c;
};
class AD
{
public:
virtual int vg() = 0;
};
class D : public AD, virtual public V
{
public:
static void s();
virtual int vg();
virtual int vd();
int fd();
int d;
};
class E : public B, virtual public V, public D, public C
{
public:
int f();
int vg();
int vv();
int e;
};
D dd;
D* ppd = ⅆ
AD* pAd = ⅆ
A a;
B b;
C c;
D d;
E e;
V v;
VB vb;
A* pAa = &a;
A* pAe = &e;
B* pBe = &e;
D* pDd = &d;
D* pDe = &e;
V* pVa = &a;
V* pVv = &v;
V* pVe = &e;
V* pVd = &d;
AD* pADe = &e;
E* pEe = &e;
VB* pVB = &vb;
void init()
{
a.vb = 1;
b.vb = 2;
c.vb = 3;
d.vb = 4;
e.vb = 5;
v.vb = 6;
vb.vb = 7;
d.d = 1;
e.d = 2;
}
extern "C" int printf(const char *, ...);
int all_count = 0;
int failed_count = 0;
#define TEST(EXPR, EXPECTED) \
ret = EXPR; \
if (ret != EXPECTED) {\
printf("Failed %s is %d, should be %d!\n", #EXPR, ret, EXPECTED); \
failed_count++; } \
all_count++;
int ret;
void test_calls()
{
TEST(pAe->f(), 20);
TEST(pAa->f(), 1);
TEST(pDe->vg(), 202);
TEST(pADe->vg(), 202);
TEST(pDd->vg(), 101);
TEST(pEe->vvb(), 411);
TEST(pVB->vvb(), 407);
TEST(pBe->vvb(), 411);
TEST(pDe->vvb(), 411);
TEST(pEe->vd(), 282);
TEST(pEe->fvb(), 311);
TEST(pEe->D::vg(), 102);
printf("Did %d tests, of which %d failed.\n", all_count, failed_count);
}
#ifdef usestubs
extern "C" {
void set_debug_traps();
void breakpoint();
};
#endif
main()
{
#ifdef usestubs
set_debug_traps();
breakpoint();
#endif
init();
e.w = 7;
e.vb = 11;
test_calls();
}
int A::f() {return 1;}
int B::f() {return 2;}
void D::s() {}
int E::f() {return 20;}
int D::vg() {return 100+d;}
int E::vg() {return 200+d;}
int V::f() {return 600+w;}
int V::vv() {return 400+w;}
int E::vv() {return 450+w;}
int D::fd() {return 250+d;}
int D::vd() {return 280+d;}
int VB::fvb() {return 300+vb;}
int VB::vvb() {return 400+vb;}
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