Draw item to random x,y position

nickyeng

i have to design a simple game.
I asked some question before in this forum.
Now the game version is the new version with more items in it.

now, i have a 11 items to draw, '$'.
and i have a function in a header file called utils.h, GetRandom() function.
code:

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inline unsigned GetRandom(unsigned min, unsigned max) {

        return rand() % (max - min + 1) + min;

    }

i have to draw that 11 items(which is the same character '$' ) randomly to the screen(specified width and height, which is 25wdth, 11 in height) using that function above.

What my examiner said :

Quote:

suppose you have decided to have 11 powerups. Where are you
going to put them? So you'll neeed to use GetRandom at least 22 times to
get random x and y positions. The min and max will depend on the size of
the screen that you'll have.

I have no idea what it means by min & max argument in GetRandom() function will depend on the size of the screen.
So, what should i put in for the min & max argument? 11 and 25 (the height and width) ?

Please could someone show the example ? because i can't figure it out.
What i have tried (which is failed ) :

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     unsigned xPos;

     unsigned yPos;
 
     for(unsigned i = 0; i <= max; i++) {

      xPos = GetRandom(1, 275);

          yPos = GetRandom(1, 275);

                screen->Insert(xPos, yPos, '$');   // draw 11 of $ into screen

     }

Banfa

Quote:

Originally Posted by nickyeng

I have no idea what it means by min & max argument in GetRandom() function will depend on the size of the screen.
So, what should i put in for the min & max argument? 11 and 25 (the height and width) ?

Please could someone show the example ? because i can't figure it out.
What i have tried (which is failed )

When it says screeen size it is not talking about the physical dimensions of you monitor (19" for instance) but the resolution of you display. For instance at a resolution of 800x600 then the max x would be 800 but at 1024x768 the max x would be 1024. Also it is likely that yougame screen will be smaller then the actual available space and that there may be margins hence the need to a minimum too.

You example at the end is unlike to be correct because it is unlikely (but not impossible) that the game screen is square.

Draw item to random x,y position

re: Draw item to random x,y position

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