#### Let's call this one labprint.c
#### Start with the following (use cut-and-paste)
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
  for (int i=0; i<argc; ++i) {
    printf("arg %3d is %s\n", i, argv[i]) ;
  }
  return 0 ;
}

#### Compile it and run it (using your c235). It should work fine.

#### 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. C reads outside the box (ok, array).


#### 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. Replace it with argc to eliminate the faults.
#### Take a *long* look at the man page for printf.
$$$$ man printf
#### Change the format to print argv[i] as a pointer.  (Use %p.)

#### Hmmm -- hex... Try %x.

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

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

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

#### Ugh -- Different sizes... Try (long)(void *)

#### Ugh -- Or maybe (unsigned long)(void *)

#### Ugh -- Change format specifier to %ld [Or is that %lu?]

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

#### But it's 64 bits... that`s 4*16.  Add a length -- %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