I bought a new calculator at the Dollar Store and, sure enough, it’s defective. After some trial and error with it, I discovered that each digit in the display contained the same two pairs of elements (out of the seven elements labeled A to G below) that were somehow ‘cross-wired’. That is, if one element was called upon to illuminate, its partner would illuminate instead. If both were supposed to illuminate, neither would! For example, if A/D and B/F were the faulty pairs, the number 3 would simply display as F/G/C, as illustrated below.
Based on the illuminated elements for each digit given below, find the faulty pairs to then solve the following 3-digit by 2-digit multiplication:
| | C/D | F/B/G/E/C | G/E/C |
| X | | F/G/C/D | F/G/E/C/D |
| F/E/C/D | F/G/C/D | F/G/E/C/D | F/E/C/D |
(In reply to
re(8): problems with computer program by Robby Goetschalckx)
I should have looked at the alternatives in http://en.wikipedia.org/wiki/Seven-segment_display_character_representations.
Inexpensive HP calculators use the scheme of http://en.wikipedia.org/wiki/Seven-segment_display, while inexpensive TI calculators seem to prefer the extra segment on the 7. More expensive calculators use a regular font rather than the segmented displays.
|
|
Posted by Charlie
on 2009-02-20 11:39:34 |
re(9): problems with computer program
