Help with game formulas

I am creating a simple adventure game and I need help with some math
formulas. I would truly appreciate any help.

In my game I have 28 different monster types. I have arranged them so
that monster number one is the weakest and monster 28 is the most
powerful. The player begins with a dexterity attribute of 10 and can
obtain a maximum of 100. I need a formula that determines whether or not
a player strikes a monster when they attack one. I would like the
formula to work with the following rules:

If the player dexterity is equal to 10 and the monster type is equal to
1, then the chances of striking the monster should be 50%

If player dexterity is equal to 100 and monster type is equal to 1, then
the chances of striking the monster should be 100%

If player dexterity is equal to 10 and monster type is equal to 28, then
the chances of striking the monster should be 0%

If player dexterity is equal to 100 and monster type is equal to 28,
then the chances of striking the monster should be 50%

Using the above data, I also need a formula to fairly determine whether
or not a monster strikes the player when they attack him.


Thank you for your help!

-Mickey

Mickey wrote:
>
> If the player dexterity is equal to 10 and the monster type is equal to
> 1, then the chances of striking the monster should be 50%
>
> If player dexterity is equal to 100 and monster type is equal to 1, then
> the chances of striking the monster should be 100%
>
> If player dexterity is equal to 10 and monster type is equal to 28, then
> the chances of striking the monster should be 0%
>
> If player dexterity is equal to 100 and monster type is equal to 28,
> then the chances of striking the monster should be 50%
>
> Using the above data, I also need a formula to fairly determine whether
> or not a monster strikes the player when they attack him.

<nitpick> Impossible, since all the rules talk about the player
hitting the monster, not the other way around.</nitpick>

Anyway, here's how to code your rules:

const int MinDex = 10;
const float MaxDex = 100.0; /* to force floating point division */
const float MaxMonLvl = 28.0;

percentChanceToHit = 50 * (1 + (dex - MinDex) / (MaxDex - MinDex)
- (monLvl - 1) / (MaxMonLvl - 1) );

Then just get a random number between 1 and 100 and compare.

--
Konrad Gaertner email: gaertk@aol.com
http://www.livejournal.com/users/kgbooklog/

Konrad Gaertner wrote:
> Mickey wrote:
>
>>If the player dexterity is equal to 10 and the monster type is equal to
>>1, then the chances of striking the monster should be 50%
>>
>>If player dexterity is equal to 100 and monster type is equal to 1, then
>>the chances of striking the monster should be 100%
>>
>>If player dexterity is equal to 10 and monster type is equal to 28, then
>>the chances of striking the monster should be 0%
>>
>>If player dexterity is equal to 100 and monster type is equal to 28,
>>then the chances of striking the monster should be 50%
>>
>>Using the above data, I also need a formula to fairly determine whether
>>or not a monster strikes the player when they attack him.
>
>
> <nitpick> Impossible, since all the rules talk about the player
> hitting the monster, not the other way around.</nitpick>
>
> Anyway, here's how to code your rules:
>
> const int MinDex = 10;
> const float MaxDex = 100.0; /* to force floating point division */
> const float MaxMonLvl = 28.0;
>
> percentChanceToHit = 50 * (1 + (dex - MinDex) / (MaxDex - MinDex)
> - (monLvl - 1) / (MaxMonLvl - 1) );
>
> Then just get a random number between 1 and 100 and compare.
>


Thanks for you help!