The following program generates an error. Why?

#include $$iostream$$

#include $<$ string$$

#include "Shopping. cpp$"$

using namespace std;

int main $()\{$

int num$1$; int num$2$; cin $>>$ num; cin $>>$ num$2$; if $($num$1>$ num$2)$

cout $$ numl $"$ is greater"$<$ endl$$

else

cout $<<$ num$2<"$ is greater" $$ endl;

return $0$;

$$ Only h files can be included, hence including Shopping.cpp is invalid.

$$ main$)$ must define a Shopping object, since the Shopping class is included.

$$ No strings are used in the program, so the include statement for string would generate an error.

$$ The variables num$1$ and num$2$ should be declared in a class and accessed through functions.