why this code not printing string in pyramid pattern??

Question

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main()
{string userinput;
cout<<"Enter your text :\n ";
getline(cin,userinput);
int n=userinput.length();
for (int i=0;i<=userinput.length();i++)
{cout<<string(n,' ')<<userinput.substr(0,i);
string str2 = userinput.substr(0,i);
reverse(str2.begin(),str2.end());
if(i>=1)
{cout<<str2.substr(1)<<endl;}
n -= 1;}
}

Answer 1

@~ swim ~
now can u try it?? i fixed it