The argument against f77 being Turing-complete is that you can't dynamically allocate memory, or specify infinite arrays, or recurse. You have to declare a finite size for everything. So a program embodies a fixed limit on how big a problem it can handle.
In C (the abstract machine with arbitrary-sized ints) you can allocate an arbitrary amount of memory. It may, of course, not run on any given machine. But the language itself allows it.
In C (the abstract machine with arbitrary-sized ints) you can allocate an arbitrary amount of memory. It may, of course, not run on any given machine. But the language itself allows it.