package Test;
import java.util.Scanner;
public class TestLingXing02 {
 public static void main(String[] args) {
  // TODO 自动生成的方法存根
  
  Scanner in=new  Scanner(System.in);
  int i,a,k,x;
  double s;  
  
  System.out.println("请输入一个整数:");
  a = in.nextInt();
  for( i = 1; i <= a; i ++ )   
  {
   if ( i <= ( a+1 ) / 2 )
   {
    x = 2* i-1;
   }
   else 
   {
    x = 2 * (a-i) + 1;
   }
   
   s =50-x/2;
   
   for ( k = 1; k < s; k ++ )
   {  
     System.out.print(" ");  
   }
   
   for ( k = 1; k <= x; k ++ )
   {
    System.out.print(" *");
   }
   System.out.println();
   
  }
 }
}
                                                  *
                                                 * * *
                                                * * * * *
                                               * * * * * * *
                                               * * * * * * *
                                                * * * * *
                                                 * * *
                                                  *
请大神解答!
天将明96
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