package calculator;
import java.util.Scanner;
public class log {
	
		public log() {
			Scanner sc = new Scanner(System.in);
			System.out.println("请输入底数a");
			double a = sc.nextDouble();
			System.out.println("请输入真数x");
			double x = sc.nextDouble();
			if(x>0&&a>0&&a!=1)
			{
				double result = log(a,x);
			    System.out.println("结果为:"+result);
			}
			else
			System.out.println("errors ");
		}

		public static double log(double a, double x){
			return Math.log(x) / Math.log(a);
		}
}