Question $7$

What is wrong in the following code?

$```$

#include

#include

using namespace std;

int main$()$

$\{$

vector v;

cout $$ v$[\backslash$theta$]$;

return $0$;

$\}$

$```$

The program has a compile error on $\backslash (\backslash$mathrm$\{$v$\}[0]\backslash ).$

The program has a compile error on vector v $.$

The program has a runtime error on vector v $.$

The program has a runtime error on v$[0],$ because the vector is empty.