A Question About Inputs

carnaxcce 2011-01-29 00:53:28 UTC #1

I have a quick question about inputs that applies to almost any problem here (I'm a real newbie when it comes to C++...):
Is it possible to use cin and cout when solving these problems? If not, could someone explain to me a preferable way?

Thanks,
Carnax

TripleM_sof 2011-01-29 02:35:40 UTC #2

You can use them, but they are very slow, so for any problem with a reasonable amount of input you will probably exceed the time limit even if your algorithm is correct. You should use C-style input/output methods instead - ie printf and scanf.

carnaxcce 2011-01-31 19:32:25 UTC #3

Okay, thanks, but I have one more question (hopefully only one). Could you (or anyone) describe to me how to use scanf & printf? I looked it up at cplusplus.com, but it confused me. Just an example, maybe using TEST would help.

-Carnax

Wait, one more question:
How do you get multiple inputs from one line of code (as there are in most problems?)

Thanks again,
Carnax

leppyr64 2011-01-31 21:34:40 UTC #4

Read the sticky at the top of this forum for an example.

carnaxcce 2011-01-31 21:41:16 UTC #5

Okay, I get that, but what about multiple inputs on one line?

Thanks,
Carnax

leppyr64 2011-01-31 22:09:29 UTC #6

scanf("%d%d", &a, &b);

carnaxcce 2011-02-01 04:24:52 UTC #7

Okay, hopefully this is my last question:
Can you give an example for how to print (using printf, obviously), an integer variable named a?

Thanks,
Carnax

leppyr64 2011-02-01 11:40:26 UTC #8

printf("%d",a);

jacobadam 2011-03-22 08:07:57 UTC #9

cout & cin are part of the iostream interface for input and output. They are an ostream object and an istream object, respectively. They use the overloaded << operator to output any object, based on its type and the various flags set by manipulators.