p6hsylpbf/b.java

//package log;
import java.util.Scanner;
public class b {
    public static void main(String[] args) {
    	int a;
    	int x;
    	double result;
    	System.out.println("输入底数a(a>0且a！=1):");
    	Scanner sc = new Scanner(System.in);
    	a=sc.nextInt();		
    	System.out.println("输入真数x:");
    	x=sc.nextInt();		
        result = log(x, a);
        System.out.println(result);
    }
 
    private static double log(double value, double base) {
        return Math.log10(value) / Math.log10(base);
    }
}