Q1. Write a subroutine that will find the first even number from an array of your VU ID and calculate its factorial. (10 Marks)
Note: Skip 0’s in your VU ID as shown below,
VU ID: BC190206435
After skipping 0’s, array would be:
Array: 1, 9, 2, 6, 4, 3, 5
The first even number is 2 in the array so its factorial will be calculated and saved in AX register.
Solution:
[org 0x100]
jmp start
data: dw 1, 9,2,6,4,3,5
;initiliazation
checkEven:
mov dl,0002h
mov ax,[data+bx]
mov cx,[data+bx]
xor ah,ah
xor ch,ch
div dl
cmp ah,00h ;checking remainder
je fact
add bx,2
jmp checkEven
fact:
mov ax,0001
mov dx,0000
mult:
mul cx
loop mult
ret
start: mov si,00h
mov bx,si
call checkEven
mov ax,0x4c00
int 0x21
Q2. Write a code in assembly language (using appropriate jumps) equivalent to this given code in C. (10 Marks)
#include <stdio.h>
int main()
{
int n1=1, n2=2;
int largest;
if( n1>n2)
largest=n1;
else
largest = n2;
return 0;
}
Solution:
Assembly code:
[org 0x100]
jmp start
n1 db 1
n2 db 2
largest db 0
start:
mov ax, [n1]
xor ah,ah
mov bx, [n2]
cmp ax,bx
ja large
mov [largest],bx
large: mov [largest],ax
mov ax, 0x4c00
int 21h
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