Thread: need real newbie help (operators)

i have to use +=,-=,/= or *= for this:

c=3-c;

please help me

i hope this explains everything to you, as my english is not that good

Well if you had

c = c - 3;

The short form would be
c -= 3;

I don't think there is a shortened form for c=3-c;

i also think there is no way, but my "so called" teacher gave me this from a c-examples book.

the 1st example was:

x = x+1 --> x+=1

the 2nd:

a = a-8 --> a-=8

the 3rd:

c = 3-c --> ????????

he also wants that nobody helps me at the place where i am right now, so i decided to write to this board

Well there is no single statement way to achieve it

But there is a dumb two statement way
c *= -1;
c += 3;

Code:

c *= -1, c += 3;

This uses the comma sequencer operator.
I'm pretty sure this one or the last one should be good enough for your assignment.