little problems with if-then and maths

[abaudrand]

Hi, I'm trying to do a checktest to determine the movement of the missile of one player depending the position of the other player.

I wrote that:

 

if player1y-player0y<30 then var6{1}=0 else var6{1}=1

 

but it will not compile. I guess I got a kind of 'syntax error'.

Do I need to broke the operation like:

 

temp2=player1y-player0y

if temp2<30 then var6{1}=0 else var6{1}=1

 

What do you think?

[+Random Terrain]

I don't try to do math in an if-then. I use a temporary variable like in your second example.

[abaudrand]

okay, I'll try tommorow. I hoped it could save a line of code... Thanks RT.

I don't try to do math in an if-then. I use a temporary variable like in your second example.

[SeaGtGruff]

if player1y-player0y<30 then var6{1}=0 else var6{1}=1

I'm able to compile that line of code without an error, so I think there must be something else wrong with your program. What makes you think it's in that line? What does the error message say?

 

Michael

[abaudrand]

When I try to do the maths inside the if-then statement, the compilation stops at this line:

 

.L0784 ; if player1y - player0y < 30 then var6{1} = 0 else var6{1} = 1

 

LDA player1y

CMP player0y

.skipL0784

.condpart344

 

But when I broke into two part the code, it works fine:

 

.L0784 ; temp2 = player1y - player0y

 

LDA player1y

SEC

SBC player0y

STA temp2

.L0785 ; if temp2 < 30 then var6{1} = 0 else var6{1} = 1

 

LDA temp2

CMP #30

BCS .skipL0785

.condpart344

LDA var6

AND #253

STA var6

jmp .skipelse10

.skipL0785

LDA var6

ORA #2

STA var6

.skipelse10

 

For the moment, I will keep it broken in two parts even I don't understand why it doesn't work

Regards.

[+RevEng]

if player1y-player0y<30 then var6{1}=0 else var6{1}=1

I'm able to compile that line of code without an error, so I think there must be something else wrong with your program. What makes you think it's in that line? What does the error message say?

 

Michael

I think compiling it requires this build of bB.

[abaudrand]

:/ I don't know if I should use this build of bB as long as it's not an official upgrade... Since I've switched to SC, I got more free variables available and I could burn one or two for storing figures for mathematical operations. I must agree this new build could spare them and I also guess it could spare cycles... (mumbling)