Formatted numeric output: Difference between revisions

=={{header|8086 Assembly}}==

The <code>PrintString</code> and <code>PrintChar</code> routines was omitted to keep this short. They handle the printing of null-terminated strings.

<lang asm> model small

stack 1024

.data

;data segment is unused in this program

.code

start:

mov ax,@code

mov ds,ax

mov es,ax

cld ;make lodsb, etc. auto-increment

mov al, byte ptr [ds:LeadingZeroes]

mov cl,al

mov ch,0

mov al,'0' ;30h

jcxz DonePrintingLeadingZeroes ;there are leading zeroes so we won't skip that section. This branch is not taken.

printLeadingZeroes:

call PrintChar ;print ascii 0 to the terminal 4 times

loop printLeadingZeroes

DonePrintingLeadingZeroes:

mov si, offset TestString

call PrintString

mov al, byte ptr [ds:TrailingZeroes]

mov cl,al

mov ch,0

mov al,'0' ;30h

jcxz DonePrintingTrailingZeroes ;there are none in this example so this branch is always taken

printTrailingZeroes:

call PrintChar

loop printTrailingZeroes

DonePrintingTrailingZeroes:

mov ax,4C00h

int 21h ;exit to DOS

TestString byte "7.125",0

LeadingZeroes byte 4 ;number of leading zeroes to print

TrailingZeroes byte 0 ;number of trailing zeroes to print</lang>