$C++$PDF code:

$*/$

#include

using namespace std;

$/**$ Displays the reverse of a non blank string s$.$

@ pre s should not be blank.

@ post The reverse of the string s is dispalyed.

$*/$

void displayBackwards$($string$)$;

int main$()\{$

string s;

cout Enter a string $-"$;

cin$>>$s;

cout$$"Reverse of string $"$ s ;

displayBackwards$($s$)$;

return $0$;

$\}$

$/**$ Displays the reverse of a non blank string s$.$

@ pre s should not be blank.

@ post The reverse of the string s is dispalyed.

$*/$

void displayBackwards$($string s$)\{$

int length $=$ s$.$size$()$;

if$($length$==0)//$base case

couts,s$[0]$ and then calls ReverseString on $s$

minus the last character. Notice that it doesn't work anymore! It no longer reverses the string. Look at what it does and

think about why.

What further changes can you make to the function to fix it$?$ In other words, write a recursive function that reverses the

string, but you aren't allowed to print out the last character in s$.$ You are allowed print out the first character in s$.$ Useful

string functions:

s$.$size$()-$ returns length of string s

s$.$substr$($pos$,$len$)-$ returns the substring of $s$ of length len starting at postion pos $($zero is first position$)$