/**

* @(#)ChieuCao.java

*

*

* @author

* @version 1.00 2009/10/23

*/

import javax.swing.JOptionPane;

public class ChieuCao {

public static void main(String[] args){

String xau;

int i,j,m;

do{

xau = JOptionPane.showInputDialog("Chieu cao:");

m = Integer.parseInt(xau);

}while(m<2|| m>24);

for(i=1;i<= (2*m) -1;i=i+2){

for(j=0;j<(2*m-1-i)/2;j++){

System.out.print(" ");

}

for(j=0;j<i;j++){

System.out.print("*");

}

for(j=0;j<(2*m-1-i)/2;j++){

System.out.print(" ");

}

System.out.println();

}

System.exit(0);

}

}