改进版贪吃蛇

①用构造函数构造贪吃蛇 snake(int der ,int CountNode,int Speed,int FoodLife ,bool Snake_life,int choise); //snake类的构造函数 snake::snake(int der ,int CountNode,int Speed,int FoodLife ,bool Snake_life,int choise) { der=4; CountNode=4; Speed=1; FoodLife=0 ; Snake_life=true; foodLife = FoodLife ;