定义一个计算xn的类，然后用该类求103的值。

import java.io.*; public class Class1 { public static void main( String args[ ] ) { SubClass a = new SubClass( 10,3 ); System.out.println( a.exp( )); } } class SuperClass { float x; int n; SuperClass( float xx , int nn ) { x = xx ; n = nn; } } class SubClass extends SuperClass { SubClass( float xx , int nn ) { super( xx , nn ); } float exp( ) { float s = 1; for ( int i = 1; i<=n; i++ ) s = s*x; return s; } }