Re: grade multiple-choice exam
"Jerry Coffin" wrote:
<snip>
Also, unless memory fails, the student ID and that student's proposed
answers were on the same line, so you wouldn't normally want to use
readline to read them (or at least not the ID).
I thought getline was a good choice for reading this line, too, it
demonstrates the nice substring capabilities available in <string>.
Something like this
while(getline(inf, line) ) // inf is a file that has been
// opened for reading
{
string id(line, 0, 7);
cout << id; // note no endl
string answers(line, 8, 100);
int code = validate(answers); // code of 0 - input
//is fine to continue to score
int sc = score(answers);
}
// do EOF stuff
where the results returned by both validate and score() are ignored, to
avoid clutter.
In my earlier post to the OP, I think I suggested validate returns a bool,
the above changes that to an int so that printing can be in main, rather
than farmed out to the functions - this strikes me as "more pure". The above
is intended to pay attention to the instructors desire for "functional
decomposition". .
In testing the snippet above, I belatedly noted that the student ids in the
test file are all the same :-)