C++ Program to make an inverted paramid with space

#include <iostream>
using namespace std ;
int main (  )
{
for ( int i=1 ; i <=10 ; i++ )
{
for ( int a=1 ; a<i ; a++ )
{
cout << " ";
}
for ( int b=i ; b<=10 ; b++ )
{
cout << b ;
}
cout << endl ;
}
return 0;
}