54.asm
lima21bd_Heaven-of-Assembly/54.asm
.model small
.stack 100
.data

a db 'Enter First Digit: $'
b db 10, 13, 'Enter Second Digit: $'
c db 10, 13, 'Result: $'

.code

main proc
    
    mov ax , @data
    mov ds , ax
    
    mov ah , 9
    lea dx , a
    int 21h
    
    mov ah , 1
    int 21h
    mov bl , al
    
    mov ah , 9
    lea dx , b
    int 21h
    
    mov ah , 1
    int 21h
    mov bh , al
    
    
    mov ah , 9
    lea dx , c
    int 21h
    
    sub bl , bh
    add bl , 48
    
    mov ah , 2
    mov dl, bl
    int 21h
    
    exit:
    
    mov ah , 4ch
    int 21h
    main endp

end main