(原题目在王爽的《汇编语言》(第三版),p172)
Power idea公司从1975年成立一直到1995年的基本情况如下:
年份 收入(千美元) 雇员(人) 人均收入(千美元)
1975 16 3 ?
1976 22 7 ?
1977 382 9 ?
1978 1356 13 ?
1979 2390 28 ?
1980 8000 38 ?
...
1995 5937000 17800 ?
下面的程序中,已经定义好了这些数据:
assume cs:codesg datasg segment db '1975','1976','1977','1978','1979','1980','1981','1982','1983' db '1984','1985','1986','1987','1988','1989','1990','1991','1992' db '1993','1994','1995' ;year dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514 dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000 ;income dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226 dw 11542,14430,15257,17800 ;number datasg ends table segment db 21 dup('year summ ne ?? ') table ends
编程,将data段中的数据按如下格式写入到table段中,并计算21年中的人均收入(取整),结果也按照下面的格式保存在table段中。
assume cs:code datasg segment db '1975','1976','1977','1978','1979','1980','1981','1982','1983' db '1984','1985','1986','1987','1988','1989','1990','1991','1992' db '1993','1994','1995' ;year dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514 dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000 ;income dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226 dw 11542,14430,15257,17800 ;number datasg ends table segment db 21 dup('year summ ne ?? ') table ends code segment start: mov ax,datasg mov ds,ax mov ax,table mov es,ax mov bx,0 mov cx,21 mov si,0 mov di,0a8h;移到雇员数 t1: mov ax,[bx] mov es:[si],ax mov ax,[bx+2] mov es:[si+2],ax;年份完毕 mov ax,[bx+84] mov es:[si+5],ax mov ax,[bx+86] mov es:[si+7],ax;收入完毕 mov ax,ds:[di] mov es:[si+0ah],ax;雇员数完毕 mov ax,es:[si+5];low 16bit mov dx,es:[si+7];high 16bit div word ptr es:[si+0ah];avg income mov es:[si+0dh],ax;存整数商 add bx,4;下一组数据的年份 add di,2;下一年的雇员数 add si,16;table 换行 loop t1 mov ax,4c00h int 21h code ends end start