struct StProduct {
  int weight;
  int price[100];

StProduct():
  weight( 0 ),
  price( ) {}
};

StProduct apple;
// some code ...
apple = StProduct();

StProduct* pbanana = new StProduct();
// some code ...
*pbanana = StProduct();

StProduct() : weight(0) {
    for(int i = 0; i < 100; ++ i)
        price[i] = 0;
}