🚀 go-pugleaf

In article <TMB.92Nov14145619@pollux.idiap.ch> tmb@pollux.idiap.ch (Thomas M. Breuel) writes:

       Even the C language has provisions for just the case that you are
       concerned with in the case of 16bit integers, 32bit longs:

	   int a = ...;
	   int b = ...;
	   int c = ...;
	   long product = a*b;
	   int result = product/c;

       In fact, on some machines, int is 32bit and long is 64bit,
       so this code will do what you want.

       Furthermore, C is being extended to allow access to 64bit types,
       so that you can write:

	   int a = ...;
	   int b = ...;
	   long long product = a*b;
	   int result = product/c;

Oops, that should, of course have been:

   long product = (long)a*(long)b;

and

   long long product = (long long)a*(long long)b;

Now, _my_ pet peeve with C is that this bug would have gone
undetected... (a compiler should warn about the lack of a conversion,
and a runtime system should catch any overflow).

					Thomas.