Extra-Terrestrials task issue

Question

Why my code don't pass the test , i think its because of 'space' somewhere in the output.
So how can i fix it?
//
#include <iostream>
#include <cstring>
using namespace std;

int main()
{
char string[32];
cin>>string;
for(int i = strlen(string); i >= 0;i--)
{

cout<<string[i];

}
}

Answer 1

Let me answer your question with another question.

Lets say we have the string "hello".
strlen will return 5.
Is string[5] a valid index?

Answer 2

So what do you think the problem is?

Answer 3

While a string is indeed the better option, it would still give you the same problem.

Why don't you try your 2nd solution, it looks very promising. :)

Answer 4

A string like "hello" isn't actually stored like that in memory.
It's actually stored as "hello\0" where '\0' is the null character, an unprintable character that marks the end of the string. (it may appear as a space, but it's not a space)

By (effectively) doing string[5] you would therefore print the null character which should not be part of the output.
"\0olleh" != "olleh"

Answer 5

Valid index will be 4

Answer 6

Maybe i should use string str , not the char str. Or make in cycle int i = strlen(string)-1