1.1.3：可视化的累加器

实现了一种可视化的累加器

import edu.princeton.cs.algs4.StdDraw;
import edu.princeton.cs.algs4.StdRandom;

class VisualAccmulator {
	private double tatol;
	private int N;
	
	public VisualAccmulator(int trials, double max) {
		StdDraw.setXscale(0, trials);
		StdDraw.setYscale(0, max);
		StdDraw.setPenRadius(.005);
	}
	
	public void addDateValue(double val) {
		N++;
		tatol += val;
		StdDraw.setPenColor(StdDraw.DARK_GRAY);
		StdDraw.point(N, val);
		StdDraw.setPenColor(StdDraw.RED);
		StdDraw.point(N, tatol / N);
	}
	
	public double mean() {
		return tatol / N;
	}

	@Override
	public String toString() {
		return "VisualAccmulator [tatol=" + tatol + ", N=" + N + "]";
	}
	
	
}

public class Test {
	@SuppressWarnings("deprecation")
	public static void main(String[] args) {
		int T = Integer.parseInt(args[0]);
		VisualAccmulator a = new VisualAccmulator(T, 1.0);
		
		for(int i = 0; i < T; i++)
			a.addDateValue(StdRandom.random());
		
		System.out.println(a);
	}
}