大连理工大学计算机原理实验实验报告三

1、计算机原理实验报告汇编语言编程部分实验（3）名称：计算学生平均成绩实验一、实验目的：1、熟练掌握运算类指令以及其对各状态标志位的影响。2、掌握运算类程序的设计及调试方法。3、掌握BC码的基本知识和BC码的转换。二、实验要求：在DO环境下利用EDIT软件来编辑源文件，并使用MAS和LINK工具对源文件进行编译 链接，最终在实现对30个学生成绩的求和以及求平均数，并将平均数转换为 BC码显示 出来。三、程序流程图：调累加和子程序调求平均值子程序调转换子程序调显示子程序返回DOS图一求平均分流程图四、程序清单：datasegmentbufdw60,70,80,90,95,98,20,30,40,50

2、dw25,35,65,67,88,99,100,78,12,23dw100,90,80,70,60,50,59,68,79,90countequ ($-buf)/2data1dw?data2db?data3db?data4db?data5db?buf1db' my name is chongkun 201383109',0dh,0ah,'$'buf2db0dh,0ah,'$'buf3db' The average score is ','$'buf4db' 80,100,100,80,75,66,58,10

3、0,69,95',0dh,0ah,'95,72,78,58,62,63,98,91,72,78',0dh,0ah,'90,85,67,74,82,59,66,88,99,77',0DH,0AH,'$'dataendsssg1segmentdw 100 dup(?)ssg1endscodesegmentassume cs:code,ds:data,ss:ssg1main:mov ax,datamov ds,axlea dx,buf1 mov ah,09h int 21h lea dx,buf4 mov ah,09hint 21hcallac

4、cumcallaveragecallconverleadx,buf3movah,09hint21hcall displayconver: mov al,data2 mov ah,0mov bl,100 div blmov data3,al mov al,ah mov ah,0 mov bl,10 div blmov data4,al mov data5,ah retaccum:movcx,countmovax,0leabx,buflop:addax,bxadd bx,2loop lop mov data1,axretaverage:movmov div mov retax,data1bl,co

5、unt bl data2,aldisplay:lop3:movsi,offset data3mov al,ds:si and al,0f0h mov cl,04h shr al,cl add al,30h mov dl,al mov al,ds:si and al,0fh add al,30h mov dl,al mov ah,02h int 21Hlop4: mov si,offset data4 mov al,ds:si and al,0f0hmovcl,04hshral,claddal,30hmovdl,almoval,ds:siandal,0fhaddal,30hmov dl,almovah,02hint21Hlop5:movsi,offset data5moval,ds:siandal,0f0hmovcl,04hshral,claddal,30hmovdl,almoval,ds:siandal,0fhaddal,30hmov dl,almovah,02hint 21Hlea dx,buf2 movah,09hint21hlop22: mov ax,4c00h; to DOSint