//=========================================================================
#define PROGRAMMER "SOLUTIONS, NoFrills"
#define PROG_CODE  "soln"
#define COURSE     "ECE-1021"
#define YEAR       (2003)
#define TERM       "Fall"
#define SECTION    (0)
#define ASSIGNMENT "HW #6C"
#define REVISION   (0)
#define TITLE      "The Mysterious Disappearing String"
#define SUBTITLE   "Extra Credit"
#define EMAIL      "wbahn@eas.uccs.edu"
#define FILENAME   "mystery.c"
//=========================================================================

// PROBLEM:
//
// The following program appears not to work properly. Of course, it is
// doing precisely what it has been told to do, but it's behavior is not
// obvious.
//
// So what "should" it do? It should be a loop that sets a string pointer
// to point to a string and then removes the last character by replacing
// replacing it with a null terminator.
//
// But since we set the string pointer to point to the original string
// each and every time through the loop, each pass through the loop should
// produce identical results (the original string with the last character
// removed).
//
// Why doesn't it? If you can adequately explain why this program behaves
// the way it does, you can extra credit on this homework assignment. Your
// explanation should be written as though a student came to you with this
// problem and you were charged with explaining it to them in sufficient
// detail so that they understand what it happening.
//
// SOLUTION:
//
// PLACE YOUR EXPLANATION HERE.
// SUBMIT THIS FILE AS YOUR HW#6C SUBMISSION.
// DON"T FORGET TO MODIFY THE HEADER AND NAME THE FILE APPROPRIATELY. 

//== INCLUDE FILES ========================================================
#include <stdio.h>  // printf()
#include <string.h> // strlen()

//== TOP LEVEL SUPPORE FUNCTION PROTOTYPES ================================
void PrintHeader(void);

//== MAIN FUNCTION ========================================================
int main(void)
{
	char *fred;
	int i;

	PrintHeader();
	printf("\n"); // Print a blank line

	do
	{
		fred = "The mysterious disappearing string.";
		printf("%s\n", fred);
		i = strlen(fred);
		fred[i-1] = '\0';

	} while(i>0);


	return(0);
}

//== SUPPORT FUNCTIONS ====================================================
void PrintHeader(void)
{
	printf("========================================"
			 "=======================================\n");
	printf("Course....... %s-%i (%s %i)\n", COURSE, SECTION, TERM, YEAR);
	printf("Programmer... %s (%s)\n", PROGRAMMER, PROG_CODE);
	printf("Assignment... %s (Rev %i) (Source Code in %s)\n",
		ASSIGNMENT, REVISION, FILENAME);
	printf("Description.. %s\n", TITLE);
	printf("              %s\n", SUBTITLE);
	printf("========================================"
			 "=======================================\n");

	return;
}