填空题
执行下面的汇编语言程序后，NUM单元中的数据是______。
DSEG SEGMENT
BUF DB ’This is a character string!$’
NUM DB 0
DSEG ENDS
SSEG SEGMENT STACK
DB 256 DUP (0)
SSEG ENDS
CSEG SEGMENT
ASSUME DS: DSEG, SS: SSEG, CS: CSEG
START: MOV AX, DSEG
MOV DS, AX
LEA SI, BUF
LP: MOV AL, [SI]
INC SI
CMP AL, ’$’
JZ DONE
CMP AL, 61H
JNE NEXT
INC NUM
NEXT: JMP LP
DONE: MOV AH, 4CH
INT 21H
CSEG ENDS
END START
【参考答案】
C