trace loop

[Unregistered]

could someone trace the loop for me.
i can't seem to get the correct answer

1 A 23
(3) while ((c1= getchar()) != '2')
c2= c1; c1: _______ c2: _____
c3= getchar();
i= getchar(); c3: _______ i: _______

the right answer is:
(3) c1: '2' c2: ' '
c3: '3' i: EOF

thanks

[jasrajva]

why have you resorted to using heirogyphics in your mail??

mayb its me
but i cant make sense out of your code

pls reformat it

[Unregistered]

int i;
ch c1,c2,c3;


1 A 23

while ((c1= getchar()) != '2') {
c2= c1;
c3= getchar();
i= getchar();
}



the right answer is:
c1: '2'
c2: ' '
c3: '3'
i: EOF


sorry about that thanks

[QuestionC]

Well, for starters I can tell you that the answer you have there is wrong... Given that code you posted, well, it actually looks like an infinite loop, but it's kinda hard to tell. Try using this code instead...

while ((c1= getchar()) != '2')
   c2= c1;
c3= getchar();
i= getchar();

The only difference is that I removed the brackets, but it makes a big difference, now only the c2 = c1 bit is in the body of the while loop, the rest executes afterwards. This code which I posted will evaluate to the results that you gave.

Let us know if you need more help with this though.