4.asm

里面有六个汇编程序

data    segment
	buf1 db "The prime numbers of 1-1000 is:",0ah,0dh,24h
	buf2 db "2",20h,24h
	buf3 dw ?
data	ends
code	segment
	assume ds:data,cs:code
start:	mov ax,data
	mov ds,ax
	lea dx,buf1
	mov ah,9
	int 21h
	lea dx,buf2
	mov ah,9
	int 21h
	mov bx,1
A1:	add bx,2
	mov buf3,bx
	cmp bx,1001 
	je A3	
	mov cx,2
A2:	mov ax,bx
	xor dx,dx
	div cx
	cmp dx,0
	je A1
	inc cx
	cmp cx,bx
	jb A2
	mov ax,buf3
	call output
	mov bx,buf3
	jmp A1
A3:	mov ax,4c00h
	int 21h
output	proc
	mov cx,0	
	mov bx,10
B1:	mov dx,0 
	div bx
	add dl,30h
	push dx
	inc cx
	or ax,ax
	jz B2
	jmp B1
B2:	pop dx
	mov ah,2
	int 21h	
	loop B2
	mov dl,09h
	mov ah,2
	int 21h
	ret
output	endp
code	ends
end	start