Erik Opavsky
HW1

2. Given an HTML file, find the URLs of all images.
	-This problem seems pretty easy to solve with regular expressions,
	and the way I would do this is to just go to java and use the library,
	since that is probably the fastest way for me to do it.  Or maybe flex if
	I can remember it.

   Given a CSV file in which each line has the form
	-Honestly, I'd import the file into libreoffice calc or excel and then 
	sort on the the grades column.

	
   Given a standard text file, remove all blank spaces at the end of lines.
	$ cat input.txt | sed 's/[ \t]*$//' > output.txt
	source: http://www.cyberciti.biz/tips/delete-leading-spaces-from-front-of-each-word.html

3. Done

4. A C memory problem
	I've managed to recreate the problem with the following program:

#include <stdlib.h>

int * x;

void foo() {
  x[0] = 1;
  x[1] = 2;

};

void bar() {
  x[3] = 3;
  x[-1] = 4;
};

int main()
{
  x = malloc(4 * sizeof (int));
  foo();
  bar();
  free(x);
  return 0;
}

	As you can see, I do x[-1] = 4, which is clearly not good.  So, I suspect the issue
	with the program is that either foo() or bar() has an out of bounds reference to 
	the array on the left side.  I did not see this issue when I went past the bounds 
	of the array to the right (i.e. x[4] = 5;).  I bet the code for either foo() or bar() 
	uses some kind of computation to get the array index which we want to modify, and 
	that computation is incorrect and sometimes gives us a negative number.