#### Let's call this one labscan.c

#### Write a program that reads pairs of numbers and prints them out.


#### Make the changes shown in the following diff and recompile

5c5
<   for (int i=0; i<argc; ++i) {
---
>   for (int i=0; i<100; ++i) {

#### Run it...  This will not go well



#### Type the command "env" to see where these values came from
$$$$ env

#### Modify your program to print the pointer not its value. Here's a diff
6c6
<     printf("arg %3d is %s\n", i, argv[i]) ;
---
>     printf("arg %3d is %d\n", i, argv[i]) ;

#### You get a "pedantic" error.  Go ahead and run it!

#### Let's get rid of the 100. Go back to argc.
#### Take a *long* look at the man page for fprintf. The reference to a pointer!
#### Change the format to print argv[i] as a pointer.  (Use %p.)



#### Ugh -- hex... Try %d.

#### Ugh -- Try to cast argv[i] to (int)

#### Ugh -- Try to cast argv[i] to (void *)   -- that is the "generic" pointer

#### Ugh -- Try to cast argv[i] to (void *) to (int), that is (int)(void *)

#### Ugh -- Different sizes... Change the (int) to (long)

#### Ugh -- Change format specifier to %ld

#### Wait...  I liked the HEX better than that.  Go to %lx.

#### But it's 64 bits... that's 4*16.  Try %16lx .

#### ALL CAPS would look better.  Try %16lX

#### Let's have some leading zero's. That's %016lX 

#### Let's add the string back in.  The output should be something like:
arg   0 is at 00007FFCD9248D59 and is ./funlab
arg   1 is at 00007FFCD9248D62 and is do
arg   2 is at 00007FFCD9248D65 and is me
arg   3 is at 00007FFCD9248D68 and is ri