FOODS = { icecream, banana, chocolatecake, lasagna, 
          steak, rice, chips, brocolli, beans} ;

dd = [| icecream,      1200,  50,  10, 120,  400     % 冰淇淋
      | banana,         800, 120,   5,  20,  120     % 香蕉
      | chocolatecake, 2500, 400,  20, 100,  600     % 巧克力蛋糕
      | lasagna,       3000, 200, 100, 250,  450     % 千层面
      | steak,         1800, 800,  50, 100, 1200     % 牛排
      | rice,          1200,  50,   5,  20,  100     % 米饭
      | chips,         2000,  50, 200, 200,  250     % 薯条
      | brocolli,       700, 100,  10,  10,  125     % 花椰菜
      | beans,         1900, 250,  60,  90,  150 |]; % 黄豆

min_energy = 3300;
min_protein = 500;
max_salt = 180;
max_fat = 320;
desserts = { icecream, banana, chocolotecake };
mains = { lasagna, steak, rice };
sides = { chips, brocolli, beans };