grade.asm

用汇编写的成绩排序及搜索算法.

.model small
.data
	grade	db	56,69,84,82,73,88,99,63,100,80
	
	msg1	db	'     grade<60: $'
	msg2	db	' 60=<grade<70: $'
	msg3	db	' 70=<grade<80: $'
	msg4	db	' 80=<grade<90: $'
	msg5	db	'90=<grade<100: $'
	msg6	db	'    grade=100: $'
	msg7	db	0dh,0ah,'$'
	
	s5		db	0		;1.2.1.4.1.1
	s6		db	0
	s7		db	0
	s8		db	0
	s9		db	0
	s10		db	0
;*************************************************************************
.code
start:
	mov	ax,@data
	mov	ds,ax
	mov	es,ax
	
	lea	di,grade
	mov	cx,10
next:
	mov	al,[di]
	cmp	al,60
	jb	b60			;<60
	
	cmp	al,70
	jb	b70			;<70
	
	cmp	al,80		
	jb	b80			;<80
	
	cmp	al,90
	jb	b90			;<90
	
	cmp	al,100
	jb	b100		;<100
	je	e100		;=100
follow:
	inc	di
	loop	next
	
	jmp		print	;打印结果
;************************************************************************
b60:
	inc	s5
	jmp	follow
b70:
	inc	s6
	jmp	follow
b80:
	inc	s7
	jmp	follow
b90:
	inc	s8
	jmp	follow
b100:
	inc	s9	
	jmp	follow

e100:
	inc	s10
	jmp	follow
print:
	lea	dx,msg1			;显示结果
	mov	ah,09h
	int	21h
	
	mov	dl,s5
	add	dl,30h
	mov	ah,02h
	int	21h
		
	lea	dx,msg7			;换行
	mov	ah,09h
	int	21h
	;***********************************	
	lea	dx,msg2			;显示结果
	mov	ah,09h
	int	21h
	
	mov	dl,s6
	add	dl,30h
	mov	ah,02h
	int	21h
		
	lea	dx,msg7
	mov	ah,09h
	int	21h
	;***********************************	
	lea	dx,msg3			;显示结果
	mov	ah,09h
	int	21h
	
	mov	dl,s7
	add	dl,30h
	mov	ah,02h
	int	21h
		
	lea	dx,msg7
	mov	ah,09h
	int	21h
	;***********************************	
	lea	dx,msg4			;显示结果
	mov	ah,09h
	int	21h
	
	mov	dl,s8
	add	dl,30h
	mov	ah,02h
	int	21h
		
	lea	dx,msg7
	mov	ah,09h
	int	21h
	;***********************************	
	lea	dx,msg5		;显示结果
	mov	ah,09h
	int	21h
	
	mov	dl,s9
	add	dl,30h
	mov	ah,02h
	int	21h
		
	lea	dx,msg7
	mov	ah,09h
	int	21h
	;***********************************	
	lea	dx,msg6			;显示结果
	mov	ah,09h
	int	21h
	
	mov	dl,s10
	add	dl,30h
	mov	ah,02h
	int	21h

	mov	ax,4c00h		;返回dos
	int	21h
	
;**************************************************************************
end		start