a small program

nmansour · 06-13-2007, 12:07 PM

Hi, I am trying to do a code which will help me write the names of some files on a web page, here is what I have tried:

Code:

#include <iostream>
using namespace std;

int main()
{
for (int i = 1; i<10; i++);
cout << "http://download.quran.islamway.com/quran3/236/00" << i;
cout << ".rm\n";

return 0;
}

I want to make it print the files on a web page, the files are 114 files in total. The first is 001.rm and the last is 114, how can this be done? I am here trying to get the first 9 files, it is because of those 00 before the first 9 files! I was then to get others starting from 10.rm to 99.rm with a 0 in front of them, then 100.rm to 114.rm

Also, can I direct the outputs to be downloaded with wget? I mean all these files one after another?

Noha Mansour

dmail · 06-13-2007, 12:21 PM

I'll just comment on the code and not if this is the best method of completing your task.
Your for loop has a semi colon after it and therefore this is the end of the control structure for the loop, I think what you meant to do is:

Code:

...
for (int i = 1; i<10; i++)
cout << "http://download.quran.islamway.com/quran3/236/00" << i << ".rm\n";
...

Avinash · 06-13-2007, 12:46 PM

If you want to direct the output into wget, output each URL on a newline (\n).

Pipe this into a file , then wget -i $output file.

Understand?

./yourprogram > output.txt
wget -i output.txt

You can pipe it straight into wget if you want.

-Avinash

nmansour · 06-13-2007, 12:46 PM

Yes, it solved my compilation problem. I hope to get a complete solution.

Noha

nmansour · 06-13-2007, 01:11 PM

Avinash,

How to pipe it staight? Excuse my ignorance in C++, I am a newbie doing a self-study.

Noha

Nylex · 06-13-2007, 01:13 PM

Use some if statements in your for loop?

nmansour · 06-13-2007, 01:17 PM

But how may I write the code to give me the file names as I want.
As I said, files with a name less than 10 have 00irm form, while files of a name greater than 9 and smaller than 100 have a 0iirm form and files of a name greater than 99 has an iiirm form?
I did this:

Code:

#include <iostream>
using namespace std;

int main()
{
    for (int i=1; i<10; i++)
	cout << "http://download.quran.islamway.com/quran3/236/00" << i << ".rm\n";
    for (int i=10; i<100; i++)
	cout << "http://download.quran.islamway.com/quran3/236/0" << i << ".rm\n";
    for (int i=100; i<115; i++)
        cout << "http://download.quran.islamway.com/quran3/236/" << i << ".rm\n";
    
    return 0;
}

Noha

Avinash · 06-13-2007, 01:32 PM

This should work!

Code:

./main.bin | wget -i -

I just compiled and ran it and got the results you wanted.

Code:

avinash@haydn ~ $ ./main.bin | wget -i -
--14:32:19--  http://download.quran.islamway.com/quran3/236/001.rm
           => `001.rm'
Resolving download.quran.islamway.com... 64.62.191.252
Connecting to download.quran.islamway.com|64.62.191.252|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 97,304 (95K) [application/octet-stream]

100%[====================================>] 97,304        92.76K/s 

That will essentially take the output of your program and pipe it into wget for downloading.

nmansour · 06-13-2007, 01:36 PM

but how to use the if statement.
I could not find how to have a condition such as 9 < i < 100, say.

Noha

Nylex · 06-13-2007, 01:38 PM

Edit: you can split that condition into two and just and (i.e. use "&&") the two together so the whole expression is true only when both parts are true.

nmansour · 06-13-2007, 01:41 PM

Nylex,
Please be more detailed,

Appreciate it,

Noha

Avinash · 06-13-2007, 01:42 PM

Why not do this?

It's shorter

Code:

#include <iostream>
using namespace std;

int main()
{
  for (int i=1; i<100; i++)
    printf("http://download.quran.islamway.com/quran3/236/%.3d.rm\n",i);
  return 0;
}

Nylex · 06-13-2007, 01:45 PM

Quote:

Originally Posted by nmansour

Nylex,
Please be more detailed,

Appreciate it,

Noha

9 < i < 100 is the same as i > 9 and i < 100, right?

Code:

if(i > 9 && i < 100)
{
  ...
}

Nylex · 06-13-2007, 01:48 PM

Quote:

Originally Posted by Avinash

Code:

#include <iostream>
using namespace std;

int main()
{
  for (int i=1; i<100; i++)
    printf("http://download.quran.islamway.com/quran3/236/%.3d.rm\n",i);
  return 0;
}

You need to include <cstdio> to use printf().

Avinash · 06-13-2007, 01:49 PM

I just ran it through g++