#include <string>
#include <cstdio>

using namespace std;

class TestA{
public:
    TestA(){
        puts("TestA::TestA()");
    }
    virtual ~TestA(){
        puts("TestA::~TestA()");
    }
    virtual void dosomething(){
        puts("void TestA::dosomething()");
    }
};

class TestB1: virtual public TestA{
public:
    TestB1(){
        puts("TestB1::TestB1()");
    }
    virtual ~TestB1(){
        puts("TestB1::~TestB1()");
    }
    virtual void dosomething(){
        puts("void TestB1::dosomething()");
    }
    void TestB1func(){
        puts("void TestB1::TestB1func()");
    }
};

class TestB2: virtual public TestA{
public:
    TestB2(){
        puts("TestB2::TestB2()");
    }
    virtual ~TestB2(){
        puts("TestB2::~TestB2()");
    }
    virtual void dosomething(){
        puts("void TestB2::dosomething()");
    }
    void TestB2func(){
        puts("void TestB2::TestB2func()");
    }
};

class TestC1: public TestB1, public TestB2{
public:
    TestC1(){
        puts("TestC1::TestC1()");
    }
    virtual ~TestC1(){
        puts("TestC1::~TestC1()");
    }
    virtual void dosomething(){
        puts("void TestC1::dosomething()");
    }
    void TestC1func(){
        puts("void TestC1::TestC1func()");
    }
};

void calldosomething(TestA &ta){
    ta.dosomething();
    if(TestB1 *p = dynamic_cast<TestB1*>(&ta)){
        p->TestB1func();
    }
    if(TestB2 *p = dynamic_cast<TestB2*>(&ta)){
        p->TestB2func();
    }
    if(TestC1 *p = dynamic_cast<TestC1*>(&ta)){
        p->TestC1func();
    }
}

int main(int argc, char **argv){
    {
        TestA ta;
        calldosomething(ta);
    }
    {
        TestB1 ta;
        calldosomething(ta);
    }
    {
        TestB2 ta;
        calldosomething(ta);
    }
    {
        TestC1 ta;
        calldosomething(ta);
    }
}