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 ; foodLife1 = FoodLife ; snakeNode *SN1= new (snakeNode); snakeNode *SN2= new (snakeNode); snakeNode *SN3= new (snakeNode); //随机生成头 head = new (snakeNode); srand((int)time(0));//用系统时间来做随机数种子 head->snake_x = rand()%30+5; head->snake_y = rand()%20 +5;