Java代写:CS455 Random Walk

Requirement

In this assignment you will write a graphics-based program to do a random walk, sometimes also known as a drunkard’s walk. This 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 assignment will give you practice with creating classes, using loops, using the java library for random number generation, doing console-based IO, and drawing to a graphics window. Also you’ll get practice in general program development.

Analysis

Randow Walk,即随机游走问题,类似布朗运动,物体在下一刻走动的方向完全是随机的。本题利用随机数生成器来模拟下一刻的方位。框架使用java的awt包实现了UI部分,我们只需要将随机算法加入到提供的框架中。
解题的关键是了解随机数生成器的用法,根据提供的框架,找到对应函数入口,根据给定的测试集进行调试即可。

Tips

从测试函数入口入手

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privatevoidtestTranslate(Impoint loc, int deltaX, int deltaY){
...
ImPoint p2 = loc.translate(deltaX, deltaY);
...
}

因此我们需要实现ImPoint类,以及translate方法,核心代码如下

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classImPoint{
privateint x;
privateint y;
...
public Impoint translate(int deltaX, int deltaY){
Random r = new Random();
int x = deltaX + nextInt(2) - 1;
int y = deltaY + nextInt(2) - 1;
returnnew Impoint(x, y);
}
...
}