How to compare two strings assembly

Question

Could anyone tell me how to compare two strings in assembly language, I`ve written the followign, but it does not seem to work.

assume cs:code, ds:data

data seg         


        

Answer 1

j is jump l is less e is equel if bl=a & bh=k here cmp is work like a-k

if here 0 or less-equal value then jle work. then n will work. if positive value jle is not work.

cmp bl,bh jle n

mov ah,2 mov dl,bh int 21h

n: mov ah,2 mov dl,bl int 21h