#include <iostream>
#include <cstdio>
using namespace std;
class Test
{
public:
    int m_value;
public:
    void testA() { printf("A\n"); }
    void testB() { printf("B:%d", m_value); }
};

int main(int argc, char* argv[])
{
    Test* test;
    //test->m_value=3;
    test->testA();
    test->testB();
    return 0;
}