;DOUBLE This program prompt the user to enter ;a number <5, ;doubles the number, and outputs the result name double .model small .stack .data prompt db 0ah,0dh,"Enter a number <5:$" msg db 0ah,0dh,"Double your number is :" result db ?,0ah,0dh,"$" .code start: mov ax,@data move ds,ax lea dx,prompt mov ah,9 ;dos fn to outputstring up to $ int 21h mov ab,1 ;dos fn to input byte into al int 21h sub al,30h ;Convert from ascii to single digit integer add al,al add al,30h ;Convert back to ascii mov result,al lea dx,msg mov ah,9 int 21h mov ax,4c00h ;4c in ah is dos exit int 21h end start
答案 0 :(得分:0)
输入多位数字: 从0开始,然后将到目前为止的值乘以10,添加新数字,对所有输入的数字重复。
输出多位数: 以空字符串开头,重复将数字除以10;保持商数。除法的其余部分告诉哪个数字PREPEND到输出字符串。当值大于0时,对商重复。
使用其他基数: 将上面的“十”替换为代表基数的数字。