汇编-判断两个字符串是否相等

使用串操作:
CMPSB|CMPSW|CMPSD
;字节串比较:DS:[ESI]-ES:[EDI]
;然后:ESI←ESI±1/2/4,EDI←EDI±1/2/4

REPE|REPZ
;执行一次串指令,ECX减1;直到ECX=0或ZF=0

源程序如下:

;功能:比较两个字符串是否相等
;作者:王文堃
;创建时间:2016/4/19

INCLUDE vcIO.inc
.data
    srcmsg BYTE 'My name is Nick, and my major is computer science',0ah,0
    destmsg BYTE 'My name is Nick, and my major is computer sciee',0ah,0
    str_output BYTE "两个字符串相等?(Y/N):%c",0ah,0
.code
main PROC
    mov esi, offset srcmsg
    mov edi, offset destmsg
    mov ecx, lengthof srcmsg
    cld ;地址增量传送
    repz cmpsb ;repz执行一次串指令后ecx减一,直到ecx=0或者zf=0即不相等
    jne FOUND
    mov al, 'Y'
    jmp DONE

FOUND:
    mov al, 'N'
DONE:
    invoke printf, offset str_output, al
    ret
main ENDP
    ;子程序
END main
    原文作者:Nick_Wang94
    原文地址: https://blog.csdn.net/Nick_Wang94/article/details/51194950
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