Re: Why people use "new" & "delete" too much?!!

i see serveral source codes , and i found they almost only use "new"
and "delete" keywords to make they object.
Why should i do that , and as i know the object is going to be destroy
by itself at the end of the app

for example:
class test
{
  public:
       int x;
}

int main(int argc, char **argv)
{
  test *n= new test;
  .
  .
  ...
  delete n;

return 0;
}
i know that the object created this way is in the heap which have much
memory than stack but why they always define objects that way , why
not just say "test n" and the object will be destroyed by itself at
the end of the program! , instead of using "new" and maybe u will
forget to "delete" at the end