Quicksort timing code mentioned in the lab

system command:  Used this for the last lab, this one too

But what if we want the output?
	Python's getoutput function
		Can we make something like it in C?  Yes, but it's going to be "interesting"
		Did you talk about heap allocation in C++ yet?  Not in my CS211
		"Just" use a pipe and a file descriptor
		Piece of cake, right!
	May as well - why not?

Create a pipeline tool that replaces newlines
	Or, replaces a particular symbol with newlines
	You can do this stuff with awk, but we'll make our own tool
	Kind of like sed
		Quick sed intro, again
		But it only looks for newlines
	Command-line options:
		-r:  remove, don't replace newlines, just remove them
		-b:  backwards, replace pattern with newline instead of newline with pattern
	Once it works:  --help option

Another example:
	Add up all the numbers in an input stream (stream_adder)
	Adding an argument to set the operator
	Calculate total bogomips using it
	Calculate the number of interrupts handled by each processor