This is my small project assembly code , about "earning Vowel Letters". It is working but the mark was not added when the questions ended. 5 questions and at latest at have to added mark but it doesn't add. For every right answer will added a mark.
page 1 : study
page 2: exam
page 3: exit
Just like this it working.
; multi-segment executable file template.
data segment
firstpage db "learning Vowel letters e,o,a,i,u",10,13,"create by:alex",10,13,"1.stady",10,13,"2.exam",10,13,"3.exit" ,10,13,"$"
std1 db "Umbrella ----> an Umbrella" ,10,13,"$"
std2 db "bird ----> a bird ",10,13,"$"
std3 db "Ice cream ----> an Ice cream",10,13," $"
std4 db "car----> a car ",10,13,"$"
std5 db "Orange ---->an Orange",10,13," $"
qone db "desk ____ desk" ,10,13,"a) a",10,13,"b) an",10,13,"$"
qtow db "apple ____apple" ,10,13,"a) a",10,13,"b) an",10,13,"$"
qth db "table ____ table" ,10,13,"a) a",10,13,"b) an",10,13,"$"
qfo db "egg ____ egg" ,10,13,"a) a",10,13,"b) an",10,13,"$"
qfi db "red ____ red" ,10,13,"a) a",10,13,"b) an",10,13,"$"
nl db 0,10,13,"$"
markze db "your mark is :0$"
markone db "your mark is :10$"
marktow db "your mark is :40$"
markth db "your mark is :60$"
markfo db "your mark is :80$"
markfi db "your mark is :100$"
count db 0
ends
stack segment
dw 128 dup(0)
ends
code segment
start:
mov ax, data
mov ds, ax
lea dx, firstpage
mov ah, 9
int 21h
mov ah,7
int 21h
mov dl,al
cmp dl,"1"
je t1
cmp dl,"2"
je t2
cmp dl,"3"
je soof
t1: mov ax,3
int 10h
lea dx,std1
mov ah,9
int 21h
mov ah,7
int 21h
lea dx,std2
mov ah ,9
int 21h
mov ah,7
int 21h
lea dx,std3
mov ah,9
int 21h
mov ah,7
int 21h
lea dx,std4
mov ah,9
int 21h
mov ah,7
int 21h
lea dx,std5
mov ah,9
int 21h
mov ah,7
int 21h
lea dx, firstpage
mov ah, 9
int 21h
mov ah,7
int 21h
t2: mov ax,3
int 10h
lea dx ,qone
mov ah,9
int 21h
lea dx,nl
mov ah,9
int 21h
mov ah,1
int 21h
mov ah,7
int 21h
mov bl,ah
cmp bl,"a"
je c1
cmp bl,"b"
je c0
lea dx ,qtow
mov ah,9
int 21h
lea dx,nl
mov ah,9
int 21h
mov ah,1
int 21h
mov bl,ah
cmp bl,"b"
je c2
cmp bl,"a"
je c0
lea dx ,qth
mov ah,9
int 21h
lea dx,nl
mov ah,9
int 21h
mov ah,1
int 21h
mov bl,ah
cmp bl,"a"
je c3
cmp bl,"b"
je c0
lea dx ,qfo
mov ah,9
int 21h
lea dx,nl
mov ah,9
int 21h
mov ah,1
int 21h
mov bl,ah
cmp bl,"b"
je c4
cmp bl,"a"
je c0
lea dx ,qfi
mov ah,9
int 21h
lea dx,nl
mov ah,9
int 21h
mov ah,1
int 21h
mov bl,ah
cmp bl,"a"
je c5
cmp bl,"b"
je c0
c0:
cmp count,0
je mark0
c1:
cmp count,1
je mark1
c2:
cmp count, 2
je mark2
c3:
cmp count, 3
je mark3
c4:
cmp count,4
je mark4
c5:
cmp count,5
je mark5
mark0:
lea dx,markze
mov ah,9
int 21h
jmp soof
mark1:
lea dx,markone
mov ah,9
int 21h
jmp soof
mark2:
lea dx,marktow
mov ah,9
int 21h
jmp soof
mark3:
lea dx,markth
mov ah,9
int 21h
jmp soof
mark4:
lea dx,markfo
mov ah,9
int 21h
jmp soof
mark5:
lea dx,markfi
mov ah,9
int 21h
jmp soof
soof: mov ax, 4c00h
int 21h
ends
end start
nl db 0,10,13,"$"
I think that the answerer from My assembly "quiz Multiply" code is not working? rather meant you to write : nl db 10,13,"$" (without the zero/comma)
mov ah,1 int 21h mov ah,7 int 21h mov bl,ah
Both these DOS functions input one character from the keyboard. Function 01h does it with echo and function 07h without echo.
What neither function does is leaving the result in the AH register that you later copy to the BL register. The result is always only in the AL register. Of course you only need to include one of these functions here.
mov ah, 01h
int 21h
mov bl, al
cmp bl,"a" je c1 cmp bl,"b" je c0 lea dx ,qtow mov ah,9 int 21h
If the user gives the correct answer (a) to the first question, you jump away to c1 where you try to award a score and terminate the program.
If the user gives the incorrect answer (b) to the first question, you jump away to c0 where you try to award a (zero) score and terminate the program.
Only if the user provides an illegal input do you present them with a second question.
Clearly the logic is faulty!
What you should do is increment the count variable each time the correct answer was given. In code it means that you by-pass the inc instruction if the correct answer was not given.
...
mov ah, 01h
int 21h
cmp al, "a" ; Correct answer to 1st question
jne Q2 ; was not given
inc count
Q2:
lea dx, qtow
mov ah, 09h
int 21h
mov ah, 01h
int 21h
cmp al, "b" ; Correct answer to 2nd question
jne Q3 ; was not given
inc count
Q3:
lea dx, qth
mov ah, 09h
int 21h
...
The part that deals with the fifth an last question can then fall through in the code that will print the mark on the screen.
...
Q5:
lea dx, qfi
mov ah, 09h
int 21h
mov ah, 01h
int 21h
cmp al, "a" ; Correct answer to 5th question
jne c0 ; was not given
inc count
c0:
...