本程序最主要的功能是形成一个当蛇吃了一个点，程序在指定的范围内自动产生一个新点，让蛇能向下一个目标前进的，直到游戏到达其跳出条件的循环。这个循环是在main函数里实现的。它由一个while…….do…..和两个switch语句组成的。其中while…..do……循环语句是管理玩游戏时的循环。其中包括产生新点的语句。而第一个switch语句是控制蛇走的方向的。第二个switch语句实现蛇走下一步的程序。-This procedure is the most important functions of a snake to eat as a point of procedure within the specified range is automatically generated a new point, so the snake can be a goal down until the game is to reach out the conditions of its cycle. This cycle is to achieve the main function. It has grown from a while ... .... Do ... .. and the two components of the switch statement. Which while ... .. do ... ... statement is to manage the cycle when the cycle of playing games. Points, including a new statement. The first statement is a control switch the direction of the snake. The second switch statement to achieve the next step of the procedure snake.