I am true at 4 test Case but i fail at test case 5, what was wrong with my code. Extra terrestrial.

Question

#include <iostream>
using namespace std;

int main() {

String s;
Cin>>s;
Int d=s.length()-1;
Char a[d];
For(int i=0;i<=d; i++) a[i]=s[d-i];
Cout<<a;
Return 0;}

Answer 1

which one is it?
ahhh extra terristical...
please put inti question not only tag

Answer 2

Dont use the for loop
use the built in library of c++ which reverses the string
Like

#include <bits/stdc++.h>
using namespace std

int main(){
String s;
Cin>>s;
reverse(s.begin(),s.end());
cout<<s<<endl;
}

Answer 3

you can reverse and print it on the fly, without using another variable.

string s;
cin >> s;
int d=s.length()-1;
for(int i=d;i >=0; i--){
cout << s[i];
}

Answer 4

or for your original code, add +1 in for loop.
for(int i=0;i<=d+1; i++) a[i]=s[d-i];

Answer 5

I've done, thank you very much.

Answer 6

Thank you!

Answer 7

But, why it need +1, I think a[d] is the end.