On Wednesday, 18 March 2015 at 23:41:41 UTC, Walter Bright wrote:
On 3/18/2015 5:45 AM, CraigDillabaugh wrote:
You said that "Unfortunately" this thinking is going out of
style "for good
reasons". I am confused (sorry, I am at work, and didn't
have time to watch
the 1+ hour video you linked to - maybe some clues were there)!
Consider this C code:
#include <stdbool.h>
#include <stdio.h>
typedef long T;
bool find(T *array, size_t dim, T t) {
int i;
for (i = 0; i <= dim; i++);
{
int v = array[i];
if (v == t)
return true;
}
}
There are several bugs in it. I've showed this to probably over
1000 programmers, and nobody found all the bugs in it (they are
obvious once pointed out). It is not easy to write bug free
loop code, and find() is a trivial function.
just for fun:
1/ '<=' instead of '<'
2/ array should be tested against null before entering the loop
3/ 'int v' instead of 'T v'
Got them all ?
