[codes=c]
#include <stdio.h>
#include <conio.h>
void main()
{
  int n,i,j;
    printf("****Hinh Hoc****\nNhap vao gia tri n :");
    scanf("%d",&n);
  
  if (n>100)printf ("– So luong qua lon –");
  else
  {
    for (i=1;i<=n;i++)
    {  
      for (j=1;j<=(2*n-1);j++)
        if(j<=n+i-1&&j>=n-i+1)printf("* ");
        else printf ("  ");
        printf ("\n");
    }  
  }
  getch();
}
/*
tam giac rong dinh tren
    for (i=1;i<=n;i++)
    {  
      for (j=1;j<=(2*n-1);j++)
        if(i==n||j==n+i-1||j==n-i+1)printf("* ");
        else printf ("  ");
        printf ("\n");
    }
*/[/codes]