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package cn.edu.gxu ;
import java.util.Scanner ;
public class Calculator {
public static void main ( String [ ] args )
{
Scanner sc = new Scanner ( System . in ) ;
double result = 1.0 ;
String Command = sc . nextLine ( ) ;
String parameters = sc . nextLine ( ) ;
if ( Command . equals ( "0" ) )
result = Calculator . Log ( parameters ) ;
// else if(Command.equals("1"))
// result=Calculator.ex(parameters);
// else if(Command.equals("2"))
// result=Calculator.jjcc(parameters);
// else
// result=Calculator.sin(parameters);
System . out . println ( result ) ;
}
public static double Log ( String s )
{
String [ ] parameters = new String [ 2 ] ;
parameters = s . split ( " " ) ; //用空格切分传过来的两个数字
float a = Float . parseFloat ( parameters [ 0 ] ) ;
float b = Float . parseFloat ( parameters [ 1 ] ) ;
double result = Math . log ( b ) / Math . log ( a ) ; //log 都是用e为底, 还要用个换底公式OvO
return result ;
}
public static double sin ( )
{
}
public static double jjcc ( ) //加减乘除哈哈
{
}
public static double ex ( ) //e的幂
{
}
}