Hi all!
Programming beginner here just reading a book by K. N. King called c programming a modern approach which is an excellent book, but i am stuck trying to understand what is going on here.
I am trying to understand why with the C89 standard that:
-9/7 is -1 -9%7 is -2
or
-9/7 is -2 -9%7 is 5
Any explanation of this would be greatly appreciated
Last edited by vulcan_; 06-03-2017 at 01:09 PM.
Modulo is defined as follows.
-9/7 * 7 + -9%7 has to equal -9
This would be true for any set of operands a and b, it so happens that here a=-9 and b=7
(-1) * 7 + (-2)
(-7) - 2 = -9
(-9/7 will never be -2 I don't know where you got that from, btw)
Last edited by whiteflags; 06-03-2017 at 01:23 PM.
