wysrodkowana piramida z gwiazdek

#include <iostream>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
int main(int argc, char** argv) {
/*  cout<<"#";*/
int i,j,h,a,x;
cout<<"podaj wysokosc";
cin>>h;
x=h;
for(j = 0; j < (h*2); j=j+2)
{for(a=1 ;a<x;a++)
cout<<" ";
    for(i = 0; i <= j; i++)

    cout << "#";
    x--;
    cout << endl;}

    return 0;
}