P52Demo3.1

.386 STACK SEGMENT USE32  DB 200 DUP(0) STACK ENDS DATA SEGMENT USE16 NUM DB 11H,22H,33H,44H NEND DB 0 LEN EQU NEND-NUM;不能直接用LEN EQU LEN-NUM，会致使宏嵌套太深 DATA ENDS CODE SEGMENT USE16 ASSUME CS:CODE,DS:DAT

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