34 lines
577 B
NASM
34 lines
577 B
NASM
; 实验三-3：分支程序示例2 - 求两个数的差的绝对值
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; 功能：求X和Y的差的绝对值，存入Z
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DATA SEGMENT
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X DB 5
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Y DB 3
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Z DB ?
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DATA ENDS
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CODE SEGMENT
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ASSUME CS:CODE, DS:DATA
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START:
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MOV AX, DATA
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MOV DS, AX
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MOV AL, X
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CMP AL, Y
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JZ EQUAL ;如果X=Y则跳转到EQUAL
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JNS PLUS ;如果X>Y则跳转到PLUS（正数）
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MOV BL, Y
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SUB BL, AL
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MOV Z, BL
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JMP EXIT
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PLUS:
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MOV BL, AL
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SUB BL, Y
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MOV Z, BL
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JMP EXIT
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EQUAL:
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MOV Z, 0
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EXIT:
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MOV AH, 4CH
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INT 21H
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CODE ENDS
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END START |