Get the last digit of a number
Wouldn't 10% only work if the int was less than 100? I was thinking that you could probably convert the int to a char array and just grab the last character in the array. I'm relatively new to c++ so take what I say with a grain of salt but what I'm suggesting sounds more accurate.
Something like
Char Last[sizeof(int)]="" + int + ""
Char Result[1]=Last[sizeof(int)-1]
Probably not syntax error free but I'd imagine something like this would probably work.
Something like
Char Last[sizeof(int)]="" + int + ""
Char Result[1]=Last[sizeof(int)-1]
Probably not syntax error free but I'd imagine something like this would probably work.
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| Wouldn't 10% only work if the int was less than 100? |
It's
% 10 (not 10 %), and it works for any size number.It returns the remainder you would get after dividing the number by 10.
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I'm relatively new to c++ so take what I say with a grain of salt but what I'm suggesting sounds more accurate.
this isnt really c++ here. Its math. what is 123456 % 10?
123456 / 10 is 12345. the remainder = 6. ...
but what is 0xABCD % 0xF? Do you see it? (D).
there are times when processing a char array from a number is more efficient. Depends on what you are doing, so your idea has value for many problems.
this isnt really c++ here. Its math. what is 123456 % 10?
123456 / 10 is 12345. the remainder = 6. ...
but what is 0xABCD % 0xF? Do you see it? (D).
there are times when processing a char array from a number is more efficient. Depends on what you are doing, so your idea has value for many problems.
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Very interesting. Clearly I'm not that familiar with the % operator. I'm pretty good at math. Never had a reason to use % in this manner. But I guess you learn something everyday. That's why I came here. Lol I may never use it again in life but good to know.
| markyrocks wrote: |
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| Never had a reason to use % in this manner. But I guess you learn something everyday. |
In what manner have you used it? This is raw beginner stuff.
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The most common uses of % have faded behind all our containers and tools; the only thing I can think of off the top of my head that uses % in a practical example would be a circular buffer. Im sure others have ideas on that, but you will see it again.
| markyrocks wrote: |
|---|
| Clearly I'm not that familiar with the % operator. Never had a reason to use % in this manner. |
Echoing dutch:
What did you know about the modulo operator before today?
How have you used it?
jonnin was apparently thinking of (confusing it with) bitwise masking with
Clearly a brain fart since he obviously knows the difference!
But using
&.Clearly a brain fart since he obviously knows the difference!
But using
& 0xF would actually be more efficient/appropriate in the hexadecimal case.
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