动态调用c++动态链接库

class Base
{
public:
virtual ~Base() {}
virtual void show() = 0;
};

typedef Base* create_obj();
typedef void  destroy_obj(Base*);
#include "myso01.h"
#include
<iostream>
class ABC : public Base
{
public:
void show();
};

void ABC::show()
{
std::cout << "ABC" << std::endl;
}

extern "C" Base* create()
{
return new ABC;
}

extern "C" void destroy(Base* p)
{
delete p;
}

#include "myso01.h"
#include<iostream>
#include<dlfcn.h>
int main()
{
void* p_lib = dlopen("./myso01.so", RTLD_LAZY);
if (!p_lib)
{
std::cout << dlerror() << std::endl;
return 1;
}
create_obj* create_abc = (create_obj*)dlsym(p_lib, "create");
char* dlsym_error = dlerror();
if (dlsym_error)
{
std::cout << dlsym_error << std::endl;
return 1;
}
destroy_obj* destroy_abc = (destroy_obj*)dlsym(p_lib, "destroy");
dlsym_error = dlerror();
if (dlsym_error)
{
std::cout << dlsym_error << std::endl;
return 1;
}
Base* p_abc = create_abc();
p_abc->show();
destroy_abc(p_abc);
dlclose(p_lib);
return 0;
}