Question

(= 5) Write a program Randomwalker.java that takes an integer command-line argument r and simulates the motion of a random walk until the random walk Manbattan distance r from the starting point. Print the coordinates at each step of the walk (including the starting and ending points), treating the start 0). Also, print the total number of steps taken.
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Answer 1

Answer:

RandomWalker {

public static void main(String args[]) {

int r = Integer.parseInt(args[0]);

int x = 0;

int y = 0;

int step = 0;

double R;

while(Math.abs(x) < r && Math.abs(y) < r) {

step++;

R = Math.random();

if(R <= 0.25) x++;

else if (R <= 0.50) x--;

else if (R <= 0.75) y++;

else if (R <= 1.00) y--;

System.out.println("(" + x + ", " + y + ")" );

}

System.out.println("steps = " + step);

}

}