Regarding print a pattern

Question How can I give spaces between numbers? When I add a <<" " after cout<<j the pattern changed. Is there any other way to give spaces between numbers?

code

#include<iostream>
using namespace std;
int main(){
int i,j=1,space,star,n;
cin>>n;
i=1;

Looping

while(i<=n){
space=n-i;
 while(space){
    cout<<" ";
    space--;
 }
star=i;
while(star){
cout<<j<<" ";
j++;
star--;
}
cout<<"\n";
   i++;
}
return 0;

}

output for n=4

    1
   23
  456
 78910

I want this output :-

      1
    2 3
  3 4 5
7 8 9 10