ca001

db 64 dup (?)

stack ends

code segment

assume cs:code,ss:stack

start:

mov ax,1010011100101010B

call CalcAmount

exit:

mov ax,4C00H

int 21H

CalcAmount:

;(統計二進制數AX中含1的個數)

;(結果放在CX中)

xor cx,cx

CA001:

shr ax,1

jz CA002

jnc CA001

inc cx

jmp short CA001

CA002:

inc cx;最後壹次右移之後AX已為0,但並CX沒有加壹,補上

ret

code ends

end start

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