一个基于图形的程序做一个随机游走，有时也被称为一个醉汉走路。假定醉汉初始位置为400x400像素图形的中央，每走一步都是5像素。方向为上下左右随机。-a graphics-based program to do a random walk, sometimes also known as a drunkard s walk. A random walk simulates the wandering of an intoxicated person on a square street grid. The drunkard will start out in the middle of the grid and will randomly pick one of the four compass directions, and take a step in that direction, then another step from that new location in a random direction, etc. This will be repeated some number of times determined by the user. The output will display the path of the drunkard as a sequence of line-segments.