I played around with the Chapter 4 version of Tank War tonight.  Here are some of the changes I made:

• I changed the explosions from rectangular to circular.
• I changed the bullets to circular instead of rectangular.
• I added rests after left/right turns (kind of like “debouncing”), so that you could actually control your turns better.
• And I changed the screen size.

Yeah, it might not be all that impressive, but playing around with the different functions helped me understand how the programming worked.

Aaron

Here is an example command line game.
Rock, Paper, Scissors using Enum and Random Numbers.
Both were asked about in the last class.

#include <stdlib.h>
#include <stdio.h>
#include <time.h>

//Global Enum can be seen in both main and win function.
enum Signal{Rock,Paper,Scissors};

int win(int a,int b);

int main(void)
{
   int i;
   int your,mine, yourscore=0,myscore=0;
   char *Words[]={"Rock","Paper","Scissors"};

   // Seed the random number generator with time value.
   srand(time(NULL));
   printf(" To play enter the number 1 - 3 and 4 to quit.\n");
   printf("Rock 1, Paper 2, Scissors 3   Quit 4\n\n");
   //Ascii value of 1 is 49 so we get a number from zero to 2.
   // the array elements are 0 though 2 but the enums are 1 though 3.
   your=getch()-49;
   while(your<3)
   {  //generate random move 0 though 2.
      mine=(rand() % 3 );

      printf("Your %s\n",(your<3 && your>-1) ? Words[your]: "Fumble");
      printf("My move %s\n",(mine<3 && mine>-1) ? Words[mine]:"Fumble");
      yourscore+=win(your,mine);
      myscore+=win(mine,your);
      printf("Your score is %d and my score is %d.\n\n",yourscore,myscore);
      your=getch()-49;
   }
   return 0;
}
int win(int a,int b)
{  if (a==Rock && b==Scissors)
   {	printf("Rock wins\n");
	return 1;
   }
   if (a==Paper && b==Rock)
   {    printf("Paper wins\n");
	return 1;
   }
   if (a==Scissors && b==Paper)
   {    printf("Scissor wins\n");
	return 1;
   }
   return 0;
}

“ENUM allows you to define a list of alliases which represent integer numbers.”  In the examples from the PDF, all of the alliases represent integers which increment by one.  Suppose I want to assign specific integer values to each allias, such as:

enum OddNumbers {one=1, three=3, five=5, seven=7, nine=9};

or

enum fibonacci {zero=0, one=1, two=2, three=3, five=5, eight=8, thirteen=13};

(Note: I did not repeat the second “one” because it would be redundant to redefine it.)

Can this be done?  …I’m assuming that it can be done since a similar thing was done in the example of the escape characters.

Thanks!

Aaron

I have a question about pointers and typedef structures…

Take the example from Neil’s PDF:

typedef struct {int age; char *name} person;

 person George, *aMan;

I can access George’s age either by George.age or by aMan->age.

 But suppose I want to create multiple persons, George and Henry.  To whose age, then, will aMan->age point?

Thanks!

Aaron

Is there a limit to how many characters you can use for a variable or type definition?  …I realize that it’s probably kosher to use concise yet descriptive labels for variables and type definitions, but is there a limit?

Thanks!

Aaron

I wrote my own program exploring variable types, and it worked just fine.

Then I opened the Type_D2.c program and tried to run it first to see how the output should look before writing my own program for type definitions.  When I compiled, ran, and viewed the output screen, all I saw was the output from my variable program.  Hmmm…  Why?  Did I run out of room on the output screen?  Do I need to clear the screen before running the other program?  What am I doing wrong?

Any suggestions?

Thanks!

Aaron

This site is set to resist being seen by Search Engines.  This is so it can remain mostly private by invitation only.  However it is publicly accessible so only write in what you are comfortable seeing published publically.

Thanks Neil C.

Be sure to checkout the Class downloads page for the list of 30 Class Topics.

I plan to average two topics per evening for a total of 15 weeks with one week off for Spring Break. (No class on Wed March 23)

The Class will be held in Wallace Hall Room 733, 7pm Wednesdays.

Here is a Link to the book I will be using it is not required but is suggested  be sure to get the 3rd Edition as the other do not apply.
http://www.amazon.com/Game-Programming-All-Jonathan-Harbour/dp/1598632892/ref=sr_1_1?ie=UTF8&qid=1297446115&sr=8-1

Looking forward to class!
Neil Chakrabarty.