Hi. I have tried an arithmetic question, but I cannot get the same final answer with the computer output. Here is the code.
int p=1;
int r=25;
int g=2;
int t=3;
int k;
k= p++ + --r/g++ - ++t%g++;
1) g++ --> g = 2+1 = 3.
2) t % g = 3%3 = 0
3) ++ t%g++ --> 0 becomes 1
4) g++ --> g = 3+1 = 4;
5) r/g = 25/4 = 6;
6) --r/g++ --> 6 - 1 = 5;
7) p++ --> 1 + 1 = 2
Then the k will be 2 + 5 - 1 = 6.However the C compiler gives me K = 13.Can anyone expert guide me where have I done wrongly? Thanks.
Last edited by Salem; 12-10-2011 at 12:30 AM. Reason: massive cleanup - improve your presentation in future
Originally Posted by ericjoe
Don't have code like this. Lay out the precedence you want followed, with parentheses, and break it up over multiple lines of code.Code:int p=1; int r=25; int g=2; int t=3; int k; k= p++ + --r/g++ - ++t%g++;
Think of someone wanting (perhaps you in 5 years) to extend or modify this code. Think of the difficulty of mapping out the precedence inherent in that line, and then multiply it by perhaps a hundred or a thousand lines of code.
Writing code like that is just kicking yourself in the butt.
Or somebody else in the face
Yeah! Hey intern, I need you to ...
> k= p++ + --r/g++ - ++t%g++;
You should either slap your "teacher" for not having a clue about C programming, or throw away your book.
Both are wrong if they think they can assert an answer from that expression.
Read -> Question 3.2
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
