ch2_2_3.java

Java环境下实现的数值分析程序

class ch2_2_3{
        public static double Elem(double n){
          double B=Math.log(n)/Math.log(10)+n-2;
          return B;
        }
        
        public static double EX(double n){
		double S=0,A=0,B=n;
		S=Math.abs(A-B);
		while(S>=0.0005){
			A=B+0.25-0.25*Elem(B+0.25)/(Elem(B+0.25)-Elem(B));
			S=Math.abs(A-B);
			B=A;
		}
		return A;
	}
	
	public static void Div(double a,double b){
		double A=0;
		for(double i=a;i<=b-0.25;i=i+0.25){
			if((Math.log(i)/Math.log(10)+i-2)*(Math.log(i+0.25)/Math.log(10)+(i+0.25)-2)<0){
			  A=EX(i+0.125);
			  System.out.println("x="+A);
			}
		}
	}
	
	public static void main(String[]args){
		Div(-50,50);
	}
}