Python does it with one line:
text = text.replace(' ', '')

Good grief Charlie Brown, where is the answer to EnderX in all this senseless squabble?

This will show the even integers between 2 and limit, then it is up to you to show the product:
#include <stdio.h>

int main()
{
int x;
int limit = 30;

for(x = 2; x <= limit; x=x+2)...

How to you handle tabs?

The .h in windows.h stands for header, it is actually C not html. Header files are there to unclutter your code and make it easier to read and hopefully understand. So by nature, header files are...

Unless there is something like a ubeep(), you are out of luck.

If you have a Windows machine you can change the frequency and duration:
// simple sounds via Beep(frequency_hrz, duration_ms)
// on the PC internal speaker, a Windows Console program

#include...

Just a short little C program to send beeps to the PC internal speaker. Beep(frequency_hrz, duration_ms) is a WinAPI function as is Sleep(ms).

There is something similar to that project on DaniWeb's C code snippets:
http://www.daniweb.com/code/snippet381.html
Sort of the next step to this project

For some existing C code take a look at:
ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/jpegsr6.zip

What is "cat" and where does it come from?

Powers of 2 are closly linked to the position values of binary numbers. The most right position is 2 to the power 0 = 1 then goes to the left with 2 to the power 1 = 2, 2 to the power 2 = 4 and...

When I learned C in school our instructor insisted on fflushing after every scanf(), sort of a bathroom thing (student humor). He was a typical puplic school teacher, not very bright. Maybe this...

Is it the processor, the operating system or the compiler?

Old Albert is wrong, human stupidity is rather limited. Infinity is much too perfect!

Donate it to your church and use it like a in your tax deductions.