countfu3.asm

用汇编语言编写的在MASM上实现大小写转换,排序,比较大小的源程序和可执行文件

DATAS SEGMENT
     ORG 3500H
     XX DB 6,12H,88H,82H,90H,22H,33H,?
          ;此处输入数据段代码  
DATAS ENDS

STACKS SEGMENT
    DB 100 DUP(?);此处输入堆栈段代码
STACKS ENDS

CODES SEGMENT
    ASSUME CS:CODES,DS:DATAS,SS:STACKS
START:
    MOV AX,DATAS
    MOV DS,AX
    MOV AX,0
    LEA DI,XX
    MOV CL,[DI]
    INC DI
    AND CH,0
    AND BL,0
 NEXT1:MOV AL,[DI]
    AND AL,80H
    CMP AL,80H
    JNE NEXT2
    INC BL
NEXT2: INC DI
    LOOP NEXT1
    MOV [DI],BL
    
    ;此处输入代码据段代码
    MOV AH,4CH
    INT 21H
CODES ENDS
    END START