Read a $3-$character string from input into variable inString. Declare a Boolean variable allDigits and assign allDigits with true if inString only contains digits. Otherwise, assign allDigits with false.

Ex: If the input is $953,$ then allDigits is assigned with true, so the output is:

Valid string

Ex: If the input is $^43,$ then allDigits is assigned with false, so the output is:

Invalid string

Note: Use getline$($cin$,$ inString$)$ to read the entire line from input into inString. #include

#include

#include

using namespace std;

int main$()\{$

string inString;

$/*$ Your code goes here $*/$

if $($allDigits$)\{$

cout $<<$ "Valid string" $<<$ endl;

$\}$

else $\{$

cout $<<$ "Invalid string" $<<$ endl;

$\}$

return $0$;

$\}$