Contest 39: Autograder

[Alvaro]

Well, back to 201. Sorry for the misinformation.

[exomo]

Code: Select all

using namespace std;

string s;
getline(cin,s,'\t');


thx, it isn't exactly the best way for me but I was able to make something out of it.

Just one last question: How should we detect the end of input? Can I do it as I like?

PS: tokxx doesn't work so I cant tell you how many tokens my prog has. I just type "tokxx contest39.cpp" and nothing is displayed.

[Kybo Ren]

I made a batch file to do it for me. Read he output tokxx gives you when you run it with no arguments. Then put a pause at the end of the batch file so you can read it.

[TheKidder]

doh! I had confused '\t' with '\r'...

[t i l e x]

Mmm, why are there some names in the list that are repeated ? How should we handle them ?

[Dante Shamest]

why are there some names in the list that are repeated ?

Some students have more than one assignment given to them.

How should we handle them ?

Check if the name already exists, and add the score to that name.

[Dante Shamest]

PS: tokxx doesn't work so I cant tell you how many tokens my prog has. I just type "tokxx contest39.cpp" and nothing is displayed.

Try tokxx -a contest39.cpp

[Kybo Ren]

why are there some names in the list that are repeated ?

Some students have more than one assignment given to them.

How should we handle them ?

Check if the name already exists, and add the score to that name.

That's actually exactly what I did.



*WARNING: SPOILER*
I used a map. I simply read, using getline, the line up until a /t. Then, I stored that in a string variable. Then I used fin >> score to read the score into my integer for score. Then I did a fin.ignore(1000,'/n') to ignore everything until the newline, just in case.

Then, I used find() to search for the name, which is my key. If it was equal to the end of the map, it wasn't in the map, so I inserted it. If it WAS in the map, I added score to the key's element.

*END SPOILER*

[t i l e x]

Ok, I wasn't sure if I had to add it.

[Dante Shamest]

I used a map.

I used a vector.

I tried using a map, but I couldn't seem to be able to sort it more than once. I know it is automatically sorted when you add items in it, but can you sort it again later on based on some other criteria?

[Kybo Ren]

Why would you want to? I suppose you could using the functions in the <algorithm> header, though.

EDIT: I like the [quote]...[/url], though

[exomo]

Try tokxx -a contest39.cpp

thanks.

I am at 530 now. I use vectors because I don't know maps and all the other stuff you are talking about.

[Kybo Ren]

Maps are soo much easier than vectors...
I took me just a few minutes to learn
I think maps are really great. I even made a directory program with them (i.e. an address book).

[Beer Hunter]

Code: Select all

getline(cin,s,'\t');

Curse you, Alvaro! Stop giving away our secrets! ;-)

[Corsix]

When you test our code I am assuming that you will feed in the data my calling C:\ myprog < test2.txt or similar. I ask this as my program checks cin.eof to know when input has finished.

EDIT: Will the test2.txt have a newline on the end? (like test1.txt) or will it not? (like the example data in the post)

PS. I'm doing it with 410 tokens

EDIT:

Then I used fin >> score to read the score into my integer for score. Then I did a fin.ignore(1000,'/n') to ignore everything until the newline, just in case.

Umm, shouldn't you be using cin not fin? beacuse fin works with files whereas cin deals with stdin?