版权声明： https://blog.csdn.net/weixin_42000150/article/details/80671980
;设有一段英文字母，其字符变量为ENG，并以'$'结束。编写程序，检查单词SUN
;在文段中出现的次数，并将次数输出显示
DATA SEGMENT
ENG DB 'SUNHUAHHDUDSUNHCUHDHUSUNHDHSUNHUHSDJSUNHHSUNJKJKSUNKOOSUNSHSUNHUIFHSUNHSAHISAHSUN$'
COUNT DW 0
DATA ENDS
STACK SEGMENT PARA STACK
DW 128 DUP(?)
TOP LABEL WORD
STACK ENDS
CODE SEGMENT
ASSUME CS:CODE,SS:STACK,DS:DATA
MAIN PROC FAR
START:
MOV AX,DATA
MOV DS,AX
MOV AX,STACK
MOV SS,AX
LEA SP,TOP
LEA SI,ENG
L0: MOV AL,[SI]
CMP AL,'$'
JE EXIT
CMP AL,'S'
JE L1
INC SI
JMP L0
L1: INC SI
MOV AL,[SI]
CMP AL,'$'
JE EXIT
CMP AL,'U'
JE L2
INC SI
JMP L0
L2: INC SI
MOV AL,[SI]
CMP AL,'$'
JE EXIT
CMP AL,'N'
JE L3
INC SI
JMP L0
L3: INC COUNT
JMP L0
EXIT:
XOR CX,CX
MOV AX,COUNT
MOV BX,10
L4: XOR DX,DX
DIV BX
PUSH DX
INC CX
CMP AX,0
JNE L4
L5: POP DX
ADD DL,30H
MOV AH,2
INT 21H
LOOP L5
MOV AH,4CH
INT 21H
CODE ENDS
MAIN ENDP
END START
;在文段中出现的次数，并将次数输出显示
DATA SEGMENT
ENG DB 'SUNHUAHHDUDSUNHCUHDHUSUNHDHSUNHUHSDJSUNHHSUNJKJKSUNKOOSUNSHSUNHUIFHSUNHSAHISAHSUN$'
COUNT DW 0
DATA ENDS
STACK SEGMENT PARA STACK
DW 128 DUP(?)
TOP LABEL WORD
STACK ENDS
CODE SEGMENT
ASSUME CS:CODE,SS:STACK,DS:DATA
MAIN PROC FAR
START:
MOV AX,DATA
MOV DS,AX
MOV AX,STACK
MOV SS,AX
LEA SP,TOP
LEA SI,ENG
L0: MOV AL,[SI]
CMP AL,'$'
JE EXIT
CMP AL,'S'
JE L1
INC SI
JMP L0
L1: INC SI
MOV AL,[SI]
CMP AL,'$'
JE EXIT
CMP AL,'U'
JE L2
INC SI
JMP L0
L2: INC SI
MOV AL,[SI]
CMP AL,'$'
JE EXIT
CMP AL,'N'
JE L3
INC SI
JMP L0
L3: INC COUNT
JMP L0
EXIT:
XOR CX,CX
MOV AX,COUNT
MOV BX,10
L4: XOR DX,DX
DIV BX
PUSH DX
INC CX
CMP AX,0
JNE L4
L5: POP DX
ADD DL,30H
MOV AH,2
INT 21H
LOOP L5
MOV AH,4CH
INT 21H
CODE ENDS
MAIN ENDP
END START