#include "polygon.h"#include <stdlib.h>#include <dlfcn.h>int main(){    typedef CPolygon* create_t();    void * handle = dlopen("./triangle.so", RTLD_LAZY);    if( !handle )    {    std::cerr << dlerror() << std::endl;    exit(1);    }    create_t * create_triangle = (create_t *)dlsym(handle, "create");    CPolygon * pObj = create_triangle();    if( 0 != pObj )    {    pObj->area();    }    delete pObj;    dlclose(handle);    return 0;}