When I try the "Extraterrestrial Code Coach," can anyone tell me why my code was invalid?

Question

/*Input any word or even phrases then this code will flip it,like this:

input=Reymark
output=kramyeR
*/

#include <iostream>
using namespace std;

int main() {
string word; getline(cin,word);
int index,i;
i = 0;
index = word.size();
string reversed ="";
while (index>=i){
reversed+=word[index];
index-=1;
}
cout<< reversed;
return 0; }

Answer 1

Reymark Marzan
index=word.size() . Now index is one more than the last index of word. So when you access it will give some garbage value. So use index=word.size()-1

#include <iostream>
using namespace std;

int main() {
string word; getline(cin,word);
int index,i;
i = 0;
index = word.size()-1;
string reversed ="";
while (index>=i){
reversed+=word[index];
index-=1;
reversed = string(reversed );
}
cout<< reversed;
return 0; }

Answer 2

Yeah! now I know.... Thanks Arun Ruban SJ
https://code.sololearn.com/cgQPprkV7e4K/?ref=app

Answer 3

Reymark Marzan maybe because u are outputting char by char,
instead try storing the result in a string first and then output.

https://code.sololearn.com/c3r3FyUieMZ1/?ref=app