struct person {
    string name;
    int age;
    double height = 71.;
    double weight = 74.;

    double calcBMI()
    {
        double bmi;
        bmi = weight / pow((height / 100), 2);
        return bmi;
    }
    void Draw(){
        printf("age=%d\n",age);
        cout<<Form("weight == %f",weight)<<endl;
        return;
    }
    void Draw1();
};

void struct_test(){
  struct person p1;
  p1.age = 78;
  cout<<p1.age<<" "<<p1.height<<endl;
  cout<<p1.calcBMI()<<endl;
  p1.Draw();
  p1.Draw1();
  return;
}

void person::Draw1(){
  printf("age=%d\n",age);  // can access age because in is in the same struct
  cout<<Form("height == %.1f",height)<<endl;
  return;
}


===================================================

Processing struct_test.C...
78 71
146.796
age=78
weight == 74.000000
age=78
height == 71.0