No. You can write a program as if you were going to do the input through
keyboard, and then set the input file as the standard input. The following
works on linux and windows:
int main(void){
int c;
cin >> c;
cout << (c+1) << endl;
}
The program above uses cin, which is the stream reader for the standard
input (usually the keyboard).
If instead of doing the input using the keyboard you want to use a number
written on file input.txt, you can just do:
app.exe < input.txt
The cout object will output the results to the standard output (usually your
screen), but you can also throw it into a file. For example:
app.exe < input.txt > output.txt
In the case above, the output of your program app.exe for the input in
input.txt will be written into the file output.txt.
Here I used C++, but that works with most programming languages.
Hope it helps
On Fri, May 7, 2010 at 8:12 AM, sandy <.....> <[email protected]> wrote:
> Can u plz tell the way of using file handling in problems.is it
> neccesary to use file handling?
>
> On 5/7/10, Leopoldo Taravilse <[email protected]> wrote:
> > Yes, I participated in 2008 and 2009 reaching 2nd and 3rd round.
> >
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