题目描述
4、通过文件输入一段英文论文，请编写查询、替换和统计等功能。
参考程序
assume cs:code,ds:data
data segment
Input db 0A0h,0A0h dup(?)
Num db 52 dup(0)
InPaper db 'Input paper:$'
Sta db 'Statistics letter number:$'
exc db 'Letter:$'
ex db 'Changed paper:$'
sh db 'Shearch letter:$'
she db 'Result:$'
Number db ?
Do db 'Choose Operation:(1:Statistics 2:Shearch 3:Finish):$'
clf db 0ah,0dh,'$'
data ends
code segment
start:mov ax,data
mov ds,ax
lea dx,InPaper
mov ah,09h
int 21h
lea dx,Input
mov ah,0Ah
int 21h
lea si,Input
mov cl,[si+1]
mov ch,0
mov bx,offset Number
mov [bx],cl
lea dx,clf
mov ah,09h
int 21h
s3:lea dx,clf
mov ah,09h
int 21h
lea dx,Do
mov ah,09h
int 21h
mov ah,01h
int 21h
cmp al,'1'
je do1
cmp al,'2'
je do2
cmp al,'3'
je do3
do1:lea dx,clf
mov ah,09h
int 21h
call Statistics_Function
jmp s3
do2:lea dx,clf
mov ah,09h
int 21h
call Shearch_Function
jmp s3
do3:mov ax,4c00h
int 21h
Statistics_Function:
pushf
push ax
push dx
mov bx,offset Number
mov cl,[bx]
mov ch,0
mov bx,2
s:cmp byte ptr [bx],'A'
jb fin
cmp byte ptr [bx],'z'
ja fin
cmp byte ptr [bx],'Z'
jna next1
cmp byte ptr [bx],'a'
jnb next2
jmp fin
next1:mov ax,0
mov al,[bx]
push bx
mov bx,offset Num
sub al,'A'
mov si,ax
add byte ptr [bx+si],1
pop bx
jmp fin
next2:mov ax,0
mov al,[bx]
push bx
mov bx,offset Num
sub al,'a'
add al,26
mov si,ax
add byte ptr [bx+si],1
pop bx
fin:inc bx
loop s
lea dx,Sta
mov ah,09h
int 21h
mov cx,52
mov si,0
mov bx,offset Num
s1:cmp si,26
ja next3
jna next4
next3:mov ax,si
sub al,26
add al,'a'
mov dl,al
mov ah,02h
int 21h
mov dl,':'
mov ah,02h
int 21h
mov dl,[bx+si]
call disp_d_1
mov dl,' '
mov ah,02h
int 21h
jmp fin2
next4:mov ax,si
add al,'A'
mov dl,al
mov ah,02h
int 21h
mov dl,':'
mov ah,02h
int 21h
mov dl,[bx+si]
call disp_d_1
mov dl,' '
mov ah,02h
int 21h
fin2:inc si
loop s1
lea dx,clf
mov ah,09h
int 21h
pop dx
pop ax
popf
ret
Shearch_Function:
pushf
push ax
push dx
mov bx,offset Num
lea dx,sh
mov ah,09h
int 21h
mov ah,01h
int 21h
push ax
lea dx,clf
mov ah,09h
int 21h
lea dx,she
mov ah,09h
int 21h
mov dl,al
mov ah,02h
int 21h
mov dl,':'
mov ah,02h
int 21h
pop ax
cmp al,'a'
jnb next5
jb next6
next5:sub al,'a'
add al,26
mov ah,0
mov si,ax
mov dl,[bx+si]
call disp_d_1
jmp ok
next6:sub al,'A'
mov ah,0
mov si,ax
mov dl,[bx+si]
call disp_d_1
ok:pop dx
pop ax
popf
ret
disp_d_1:
pushf
push ax
push dx
mov al,dl
mov ah,0
mov dl,10
div dl
mov dl,al
call disp_hd_1
mov dl,ah
call disp_hd_1
pop dx
pop ax
popf
ret
disp_hd_1:
pushf
cmp dl,9
ja L1_1
call disp_1_dec
jmp L1_2
L1_1:
call disp_1_hex
L1_2:
popf
ret
disp_1_dec:
push ax
push dx
pushf
add dl,30h
mov ah,02h
int 21h
popf
pop dx
pop ax
ret
disp_1_hex:
push ax
push dx
pushf
add dl,37h
mov ah,02h
int 21h
code ends
end start
运行截图
