The Big Programming Thread - Page 380

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Thread Rules
1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution.
2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20)
3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible.
4. Use [code] tags to format code blocks.

Manit0u

Poland17865 Posts

October 23 2013 08:01 GMT

#7581

On October 23 2013 05:22 Tobberoth wrote:
Shouldn't isdigit be enough?

bool found_nondigit = false;
for (int i = 0; i < strLength; i++)
{
    if (isdigit(xString.at(i)) != 0)
    {
        found_nondigit = true;
    }
}

return !found_nondigit;

http://stackoverflow.com/questions/13440831/how-do-i-check-if-input-is-an-integer-string

Rollin

Australia1552 Posts

October 23 2013 11:57 GMT

#7582

On October 23 2013 16:38 Tobberoth wrote:

Show nested quote +

I guess it depends on what you want to do. If you want to work at a company doing cellphone games, android is obviously the way to go. If you want to work on PC/Console AAA titles, C++ will probably be more important to know. Java is just not really useful for games, it's so rare to use it. I would assume most "real" commercial android games are programmed in other languages than java, such as C++.

If I were you, I would go with C++ and SFML. SDL works I guess, but SFML is just much cleaner and powerful, and modern for that matter.

An android/iOS port for SFML is also in the making as of right now. If you're more comfortable with Java there is a port for that too, although mobile support will take longer.

LaNague

Germany9118 Posts

October 23 2013 12:40 GMT

#7583

hi guys, i currently have some university level CS courses. They are either general stuff or Java related.
So, i wanted to learn C# "on the side" because a lot of companies in my area use it.

Does anyone have a good source for exercises and little projects?
I learned C++ this way in my youth and i still remember most of it, so i think its a very good way for me to learn, but i dont have the time atm to come up with my own projects like i did when i was still in school.

I have Murach Csharp book, but the exercises are very simple.

Mstring

Australia510 Posts

October 23 2013 13:07 GMT

#7584

On October 23 2013 21:40 LaNague wrote:
Does anyone have a good source for exercises and little projects?

Use it or lose it... your own imagination that is

gedatsu

1286 Posts

October 23 2013 17:34 GMT

#7585

On October 23 2013 21:40 LaNague wrote:
Does anyone have a good source for exercises and little projects?

http://projecteuler.net/

sob3k

United States7572 Posts

October 25 2013 05:01 GMT

#7586

Can someone on here who knows their way around CSS/HTML and keyframe animations PM me? I have some questions/issues and want to bounce a few ideas off of someone who knows what they're doing. Would be suuper helpful!

FFGenerations

7088 Posts

October 25 2013 10:40 GMT

#7587

For a class assignment I have to produce a simple "pokemon" game in C# to get used to object orientated style ("object orientation"?)

The game is turn-based:

player1 chooses 6 monsters
player2 chooses 6 monsters
each monster has 4 skills

game starts:
player1 selects 1 of his monsters
player 2 selects 1 of his monsters

player1 clicks a skill on his monster; damage is dealt to opponent's monster
player 2 clicks a skills on his monster; damage is dealt to opponent's monster

repeat until a player's monster's health is 0.
when this occurs, that player must choose one of his remaining monsters to continue to battle with

i am just trying to figure out the logical process of it...

we are supposed to start with classes then try to write use case texts

so i have classes:
ability
monster
player
GUI

for use case text i am looking at something like this:

Attack With a Monster:

1. user clicks on a monster's attack button
2. system calls monster's attack function
3. attack function checks to see what is opponent's monster
4. attack function completes with effect (damage/heal)
(end turn)
5. system calls endTurn function
6. system checks health of opponent's monster
7. if opponent monster has health, call nextTurn function passing in needNewMonster as 0
8. nextTurn changes activePlayer to player2 and nonActivePlayer to player1
9. system triggers startTurn function which sees needNewMonster 0 and opens activePlayer's currentMonster attack GUI

alternative from 7:
7. if monster has no health, call nextTurn function passing in needNewMonster as 1
8. nextTurn changes activePlayer to player2 and nonActivePlayer to player1
9. system triggers startTurn function which sees needNewMonster 1 and opens activePlayer's chooseNewMonster GUI

if anyone with a fast mind would like to have a quick read through of this and see if i'm overcomplicating it ...

i want to check the health of opponent's monster at the end of the turn - if it's 0 then that player needs to select a new monster before we allow player2 to make his attack

THANKS ps i dont really want solutions unless its an example of how to condense this better

FFGenerations

7088 Posts

October 25 2013 11:09 GMT

#7588

ps , my tutor wrote his in a different way (for prototype purpose)

what i thought was to check a player's array of monsters - if they are all null then that player has lost.

however , my tutor instead set an attribute of each monster object to isDefeated , and instead checked these.

a side-effect of this is that he retains a list of which monsters belong to each player even after they're dead, so can do things like grey them out on the monster select screen.

can you see how my thinking differed from his, here?

its interesting

bangsholt

Denmark138 Posts

October 25 2013 11:35 GMT

#7589

A few notes:

Your number 7 in your use case could as well call a function only when you need a new monster. You have an if statement after all.

Number 9 is then looking at some variable you probably set in the player object to figure if you should open the attack GUI or select monster GUI

Why do you want to set the references to the monster to null? You're effectively losing the information and if you forget a null check your program dies (which, depending on how well you have structure your program also can take considerable time to figure out where happens)

I would go with your teachers suggestion because you don't lose information then

FFGenerations

7088 Posts

October 25 2013 11:50 GMT

#7590

i think this is what you mean:

6. system checks health of opponent's monster
7. if opponent monster has no health, set opponent's needsNewMonster attribute to 1
8. system calls nextTurn, changing activePlayer to player2 and nonActivePlayer to player1
9. system calls startTurn function which checks needsNewMonster
10. if needsNewMonster if 1, system opens activePlayer's selectMonster GUI
11. (go to select monster use case)

edit: my tutor said i should also have a Main or Game class instead of putting lots of stuff in the GUI class

supereddie

Netherlands151 Posts

October 25 2013 12:40 GMT

#7591

Your use cases are too big. Make them smaller/split them up.

Shield

Bulgaria4824 Posts

October 25 2013 13:35 GMT

#7592

So if I want to read different board puzzles from files which I then store as objects each, what List should I choose if I don't need thread-safety? I think LinkedList would suit me because of fast insertion. However, if I need to get the object of puzzle No "x", then it would be O(n) which is still fine by me. Thoughts?

patermatrix

64 Posts

October 25 2013 13:42 GMT

#7593

On October 25 2013 22:35 darkness wrote:
So if I want to read different board puzzles from files which I then store as objects each, what List should I choose if I don't need thread-safety? I think LinkedList would suit me because of fast insertion. However, if I need puzzle No "x", then it would be O(n) which is still fine by me. Thoughts?

Unless we're talking about tens of thousands of entries it really doesn't matter.

Additionally, if your code uses interfaces instead of concrete classes (I assume you're programming in Java or C#), it should be quite easy to change the underlying implementation of List.

spinesheath

Germany8679 Posts

October 25 2013 14:02 GMT

#7594

On October 25 2013 22:35 darkness wrote:
So if I want to read different board puzzles from files which I then store as objects each, what List should I choose if I don't need thread-safety? I think LinkedList would suit me because of fast insertion. However, if I need to get the object of puzzle No "x", then it would be O(n) which is still fine by me. Thoughts?

Think about that fast insertion thing again: You're reading files. From disk. The slowest thing in the whole computer by a factor of like 100,000. Does insertion time matter?

devilesk

United States140 Posts

October 25 2013 14:20 GMT

#7595

Did I go full retard this morning, or am I just arguing with one? I think a little bit of both. I need an unbiased third party opinion on this.

http://www.reddit.com/r/DotA2/comments/1p6sds/is_it_possible_for_a_game_to_result_in_a_draw/cczb32w?context=3

tofucake

Hyrule19264 Posts

October 25 2013 14:34 GMT

#7596

That's...essentially true.

spinesheath

Germany8679 Posts

October 25 2013 14:36 GMT

#7597

On October 25 2013 23:20 devilesk wrote:
Did I go full retard this morning, or am I just arguing with one? I think a little bit of both. I need an unbiased third party opinion on this.

http://www.reddit.com/r/DotA2/comments/1p6sds/is_it_possible_for_a_game_to_result_in_a_draw/cczb32w?context=3

It very much depends on the implementation. LoL games can be a draw as far as I know.

Typically, such a game works in frames; all things that happen in one frame are calculated and in a seperate, later action triggers like winning are checked based on the new frame state. And if the game is programmed such that it checks if both teams fulfill the win/lose condition during the same frame, it is a draw, then it is a draw. If it doesn't care about the second team and just declares a winner as soon as it finds someone met the winning condition, then it's not a draw.

It is however not out of the realm of possibility that the game enters winner-determined-mode as soon as some condition is met during frame update.

I'd say it is very likely that draws are possible in DotA2.

Also: clearly both.

(and that other guy certainly has no idea about game programming)

devilesk

United States140 Posts

October 25 2013 14:48 GMT

#7598

On October 25 2013 23:36 spinesheath wrote:

Show nested quote +

I just think whether ties can or can't be implemented has nothing to do with the actual CPU only being able to execute one instruction at a time, which is what the other guy seems to be arguing.

spinesheath

Germany8679 Posts

October 25 2013 14:56 GMT

#7599

On October 25 2013 23:48 devilesk wrote:

Show nested quote +

I just think whether ties can or can't be implemented has nothing to do with the actual CPU only being able to execute one instruction at a time, which is what the other guy seems to be arguing.

This is absolutely, certainly and without a shadow of a doubt true (source: CS student with actual programming practice).

if(x && y) draw();
else if(x) win(team1);
else if(y) win(team2);

adwodon

United Kingdom592 Posts

October 25 2013 14:57 GMT

#7600

You're sort of right but I'd have argued it slightly differently. Since really processing is so fast there is always going to be one action occurring before the other, one event being processed before and while you could do some sort of win state check it doesn't seem like something that would scale well to large games, at least based on my very limited understanding.

Since DotA2 is a multiplayer game though latency could come into play and two clients may both claim to have the winning blow, in which case you could consider that a tie provided they are within a close enough time window, but that's assuming I know how the game is implemented, which I don't and its probably far more elaborate and doesn't allow for that kind of situation.

The guys reasoning is technically OK I suppose, he's just not engaged his brain and thought about the question, the question is whether its possible within the game, unless its been seen to happen that can only be known by a developer. He made a reasonable assumption as to why they wouldn't be forced to include a draw condition (ie the winner could always accurately be determined) but of course they could just throw one in any way, there are no rules saying they can't so really its a bit of a daft argument and I don't know why you continued it as long as you did.

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