Should I delete things created by the new keyword in main.cpp?

If I understand correctly (which I am not claiming I do), you should delete anything created with the new keyword in your Destructor for a particular class. That prevents memory leaks. Example:

#include "Bar.h"

Bar bar_;

Foo::Foo()
{
    bar_= new Bar();
}

Foo::~Foo()
{
    delete bar_;
}

But should you delete new things created in main.cpp? Or will they just be automatically deleted by their Destructors when they go out of scope?

#include "Foo.h"

int main()
{
    MakeNewFoo();
    //Do other stuff and forget foo ever existed
    exit(0);
}

void MakeNewFoo(){        
    Foo foo = new Foo();
}