sample5_1.java

实现用于工程计算的的数学方法

/*
 * 示例程序Sample5_1: NLEquations类的求非线性方程实根的对分法
 */
package javaalgorithm.sample;

import javaalgorithm.algorithm.NLEquations;

public class Sample5_1 
{
	public static void main(String[] args)
	{
		// 建立NLEquation的子类，在其中重载函数func
	 	class NLEq extends NLEquations
		{
	 		protected double func(double x)
	 		{
				double z = (((((x-5.0)*x+3.0)*x+1.0)*x-7.0)*x+7.0)*x-20.0;
				return z;
	 		}
		}
		// 求解
	 	NLEq nleq = new NLEq();
		double[] x = new double[6];
		int n = nleq.getRootBisect(6, x, -2, 5, 0.2, 0.0001);
		System.out.println("求得如下" + n + "个根：");
	    for (int i=0; i<=n-1; i++)
		{
			System.out.println(x[i]);
		}
	}
}