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Join Date: Nov 2006
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Newbie Poster
hi guys, I just wanna learn how to convert from ASCII character to the value e.g. input X then the output is 10 etc.
anyone know please help
thanks :lol:
anyone know please help
thanks :lol:
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Join Date: Nov 2006
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Junior Poster in Training
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Originally Posted by TheFuture 
hi guys, I just wanna learn how to convert from ASCII character to the value e.g. input X then the output is 10 etc.
anyone know please help
thanks :lol:
xor ah,ah
int 16h ;read in ascii character ( in range '0' - '9' ) into al
sub al, 48 ;convert ascii character to integer in range 0-9
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Join Date: Nov 2006
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Newbie Poster
thanks for your reply
but it too advance for me, it is posible show me in CPU Sim?
thanks so much
but it too advance for me, it is posible show me in CPU Sim?
thanks so much
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Junior Poster in Training
It's not that complicated. Ascii characters are represented by numbers, so that, for example:
mov al, 'A' ;actually moves the number 65 into al, because that's its ascii code
mov al, 'B' ;actually moves the number 66 into al
mov al, C' ;moves 67 into al, and so on.
In the case of the numerals it's:
mov al, '0' ;moves the number 48 into al
mov al, '1' ;moves the number 49 into al
mov al, '2' ;moves the number 50 into al
mov al, '3' ;moves the number 51 into al
So if you subtract 48 from any of those four, you get 0, 1, 2 and 3 respectively - the conversion you want.
mov al, 'A' ;actually moves the number 65 into al, because that's its ascii code
mov al, 'B' ;actually moves the number 66 into al
mov al, C' ;moves 67 into al, and so on.
In the case of the numerals it's:
mov al, '0' ;moves the number 48 into al
mov al, '1' ;moves the number 49 into al
mov al, '2' ;moves the number 50 into al
mov al, '3' ;moves the number 51 into al
So if you subtract 48 from any of those four, you get 0, 1, 2 and 3 respectively - the conversion you want.
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Join Date: Sep 2006
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Newbie Poster
use ctoi function
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Join Date: Nov 2006
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Newbie Poster
thanks so much for your help
but I know how to declares the character already .. the problem is how to get the program working
but I know how to declares the character already .. the problem is how to get the program working
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Join Date: Aug 2005
Location: near St Louis, Missouri, USA
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Originally Posted by TheFuture
thanks so much for your help
but I know how to declares the character already .. the problem is how to get the program working
Where is your code? What have you tried? People here are not mind readers, so you need to post YOUR code. And please use code tags as described in the links in my signature.
I think it's about time we voted for senators with breasts. After all, we've been voting for boobs long enough. ~Clarie Sargent, Arizona senatorial candidate
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
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Join Date: Nov 2006
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Newbie Poster
thanks for your reply
here the code
here the code
start:
read A0
push A0 ; save A0
push A1 ; save A1
load_fp A1 8 ; load parameter C
; compare to ASCII I to M
load_c A0 73 ; ASCII I
subtract A1 A0 ; A1 = int(C)
jmpn A1 outof
move A1 A0 ; copy it
load_c A1 M ; max value
subtract A1 A0 ; A1 = M - int(C)
jmpn A1 outof
; return result
store_fp A0 6 ; result
endDA: ; restore accumulators
pop A1
pop A0
return
outof: ; return -ve
store_fp A1 6 ; -ve
jump endDA
I: .data 2 73
V: .data 2 86
X: .data 2 88
L: .data 2 76
C: .data 2 67
D: .data 2 68
M: .data 2 77 Last edited by TheFuture : Nov 28th, 2006 at 2:13 pm.
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