#include "TGeoManager.h"
#include "TGeoMaterial.h"

int main()
{
    TGeoManager* g = new TGeoManager("geo","geo");
    TGeoMixture* material   = new TGeoMixture("material", 1, 1.0);
    material->DefineElement(0, 12.00,  6., 1.0);
    g->AddMaterial(material);
    
    return 0;
}