Multiply x n times ( x ^ n = x * x * x ... . n times )
for ( int i = 2 ; i <= n ; i ++ ) res_size = multiply ( x , res , res_size ) ; cout << x << " ^ " << n << " ▁ = ▁ " ; for ( int i = res_size - 1 ; i >= 0 ; i -- ) cout << res [ i ] ; }