Bsave and Bload problems...

[na_th_an]

I'm totally confused... Can anybody tell me how big array must I dim for 9x9 image in SCREEN 7 pls?

In SCREEN 7 you have 16 colours. Each one can be represented by 4 bits, that's the half of a byte. So you need an amount of memory that's equal to the number of pixels divided by two.

9x9 -> 81 pixels; 81/2 = 41 if we round it up.

You are creating an integer array to hold this data, and an integer takes 2 bytes. So the array has to have as much indexes as the number of bytes divided by two, rounded up:

41 bytes -> 41/2 = 21 if we round up.

So we need 21 integer array positions to store 41 bytes. We also need two extra array positions so GET can store width/height, that makes a total of 43 array positions.

As QB arrays begin in 0, you have to DIM your array this way:

Code:

DIM sprite%(42)

[Eurodance]

I'm totally confused... Can anybody tell me how big array must I dim for 9x9 image in SCREEN 7 pls?

So we need 21 integer array positions to store 41 bytes. We also need two extra array positions so GET can store width/height, that makes a total of 43 array positions.

As QB arrays begin in 0, you have to DIM your array this way:

Code:

DIM sprite%(42)

If I understood you correctly, it must look so:

Code:

DIM sprite%(22)

because 21 + 2 isn't 43 :lol:

[na_th_an]

Sure I made a mess with myself now EDITed

[Eurodance]

[Eurodance]

[Eurodance]

And I must BSAVE 2*23=46 bytes?

[Eurodance]

I tested it and it doesn't work
It must be dimmed at least to 41 bytes:

Code:

DIM Sprite%(41)

I don't understand...

[Eurodance]

FINALLY!

DIM Sprite%(37)

or

DIM Sprite%( 1 TO 38 )

and that said the formula in QB help