计算机等级考试三级PC技术上机18

1、2013年计算机等级考试三级pc技术上机（18）请编制程序，其功能是：以source开始的内存区域存放着20个字节的信息，其中有ascii字符和汉字机内码。若一个字节中最高位为0，则表示ascii字符，若连续两个字节的每个字节最高位均为1，则为汉字机内码(表示一个汉字)。将ascii字符个数存入result指示的单元，表示汉字的个数存入下一个单元，其后存放原来20个字节的信息。例如：内存中有 30h,38h,89h,a9h,e0h,97h,61h,4ah结果为 04h,02h,30h,38h,89h,a9h,e0h,97h,61h,4ah部分程序已给出, 其中原始数据由过程load从文件inp

2、ut1.dat中读入source开始的内存单元中。运算结果要求从result开始存放,由过程save保存到文件output1.dat中。填空begin和end之间已给出的一段源程序使其完整(空白已用横线标出,每行空白一般只需一条指令, 但采用功能相当的多条指令亦可),或删除begin和end之间原有的代码并自行编程来完成要求的功能。对程序必须进行汇编,并与io.obj链接产生prog1.exe执行文件,最终运行程序产生结果(无结果或结果不正确者均不得分)。调试中若发现整个程序中存在错误之处, 请加以修改。试题程序：extrn load:far,save:farn equ 20esc_code

3、equ 27stac segment stackdb 128 dup(?)stac endsdata segmentsource db n dup(?)result db n+2 dup(0)name0 db input1.dat,0name1 db output1.dat,0data endscode segmentassume cs:code,ds:data,ss:stacstart proc farpush dsxor ax,axpush axmov ax,datamov ds,axmov es,ax ;置附加段寄存器lea dx,source ;数据区起始地址lea si,name0

4、;原始数据文件名mov cx,n ;字节数call load ;从input1.dat中读取数据;*begin*lea si,sourcemov di,offset result+2mov cx,nmov dx,0 ;ascii字符个数在dl中，汉字个数在dh中lpst: mov al,simov di,al_ al,80hjz lasciiinc si_dec cxjz _mov al,simov di,altest al,80hjz _inc dhjmp lpcom1lascii: _lpcom1: inc siinc diloop lpstrest11: lea di,resultmov

5、 _,dlinc dimov di,_;*end*lea dx,result ;结果数据区首址lea si,name1 ;结果文件名mov cx,n+2 ;字节数call save ;保存结果到文件retstart endpcode endsend startmer4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgz7r4i30ka1dkagtgkqcwa3p tgz7r4i30ka1dkaghn3xtkknbycudxqa7fhyi2chhi92tgkqcwa3ptgshls50clmtwn60eo8wgqv7xav2ohum32wgeauw

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