汇编串操作程序设计 计算X+(Y-Z)=W

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串操作程序设计 HLJU 设X、Y、Z均为双精度数，它们分别存放在X、X+2、Y、Y+2、Z、Z+2存储单元中，存放时高位存高地址，低位存低地址，编写程序实现下面表达式的计算：X+(Y-Z)=W

代码语言：javascript
复制
 DATA      SEGMENT
               STRING1 DB 'The 1th string:','$'
               STRING2 DB 'The 1th string:','$'
               OLDS DB 10 DUP(?)
               NEWS DB 10 DUP(?)
               LEN DW 5 ;
               STR1 DB 'YES','$'
               STR2 DB 'NO','$'
DATA ENDS

CODE      SEGMENT

ASSUME CS:CODE,DS:DATA

START:

MOV  AX,DATA

MOV  DS,AX

MOV  ES,AX

LEA     DX,STRING1

MOV  AH,9

INT    21H


           MOV  CX,LEN
           MOV  SI,0



AGAIN1:  MOV  AH,01H

INT     21H

MOV  OLDS[SI],AL

INC     SI

LOOP  AGAIN1

MOV   AH,2

MOV   DL,0AH

INT      21H

MOV   AH,2

MOV   DL,0AH

INT      21H

LEA     DX,STRING2

MOV  AH,9

INT     21H


           MOV  CX,LEN
           MOV  DI,0



AGAIN2:  MOV   AH,01H

INT     21H

MOV   NEWS[DI],AL

INC     DI

LOOP  AGAIN2

MOV   AH,2

MOV   DL,0AH

INT      21H

MOV   AH,2

MOV   DL,0DH

INT      21H

MOV   CX,LEN

LEA      SI,OLDS

LEA      DI,NEWS

CLD

REPZ    CMPSB

JNE      NO


YES:         LEA      DX,STR1

MOV    AH,09H

int        21H

JMP     FINAL


NO:         LEA      DX,STR2

MOV    AH,09H

INT      21H

JMP      FINAL


FINAL:

MOV AH,4CH

INT 21H

CODE    ENDS

END      START

#程序设计