strong/weak typing and pointers
Duncan Booth
duncan.booth at invalid.invalid
Fri Oct 29 04:50:49 EDT 2004
Gabriel Zachmann wrote:
> Is it correct to say that strong/weak typing does not make a
> difference if one does not use any pointers (or adress-taking
> operator)?
>
> More concretely, I am thinking particularly of Python vs C++.
> So, are there any examples (without pointers, references, or
> adress-taking), which would have a different result in Python and in
> C++?
Here's a trivial example that is almost identical in Python and C/C++ but
gives totally different results. In a weakly typed language such as C or
C++:
#include <stdio.h>
int main(int argc, char**argv)
{
float f = 3;
printf("value is %d", f);
}
I get the output (you may get different results):
value is 0
In a fairly strongly typed language such as Python:
>>> f = 3.0
>>> print "value is %d" % f
value is 3
In a really strongly typed language I would expect an exception to
be thrown.
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