Boolean issue or assignment issue?

R Pankau · 2012-11-25 18:02

Maybe this is just a quiz that I've failed.

why would this:

if (price_filled_flags == $3FFFFFF) AND  ( max_price >= Prices[25])

        OUTA[_AC_RELAY] := _ON 
        OUTA[_FAN_RELAY] := _ON 
        waitcnt(clkfreq/100 + cnt)  
        OUTA[_FAN_RELAY] := (_OFF | force_relay2)
        
        IF debug_flag == 1 
          PST.str(string("Relay ON max = "))
          PST.dec(max_price)
          PST.char(13)

cause the variable max_price to result in -1 (true)
but this:

if (price_filled_flags == $3FFFFFF) AND  ( max_price > Prices[25])

        OUTA[_AC_RELAY] := _ON 
        OUTA[_FAN_RELAY] := _ON 
        waitcnt(clkfreq/100 + cnt)  
        OUTA[_FAN_RELAY] := (_OFF | force_relay2)
        
        IF debug_flag == 1 
          PST.str(string("Relay ON max = "))
          PST.dec(max_price)
          PST.char(13)

works as expected without modifying max_price?
correct me if I'm wrong but >= is not assignment right?

R Pankau · 2012-11-25 18:10

maybe it's a "promotion" thing?
looking at Boolean AND in the prop manual

Duane Degn · 2012-11-25 18:11

R Pankau wrote: »

correct me if I'm wrong but >= is not assignment right?

Wrong. You want "=>". Just about any operator ending with "=" is an assignment.

R Pankau · 2012-11-25 18:18

that'll do it.
I was thinking left = was assignment.

Boolean issue or assignment issue?

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