I just want too write simple .asm c开发者_StackOverflow中文版ode for TASM that work as for in C++
int t=2;
for(int i=0;i<2;i++)
t=t+(i-1)*7*t;
How can I implement it with TASM?
This will loop from 1 to 100 in 8086 TASM:
.MODEL SMALL
.STACK 100h
.DATA
Finished DB 10, 13, 'Loop x 100 finished. Congratulations! $', 10, 13
.CODE
MAIN PROC
MOV AX, @data ; Required at the start of every program (inside your main procedure, from what I've seen)
MOV DS, AX
MOV CX, 100 ; Set CX to 100
MOV BX, 0 ; Counter (for double-verification, I guess...lol)
StrtLoop: ; When a loop starts, it does CX-- (subtracts 1 from CX)
INC BX ; This does BX++, which increments BX by 1
LOOP StrtLoop ; Go back to StrtLoop label
CMP BX, 100 ; Compare BX to 100...
JE DispMsg ; Jump-if-Equal...CMP BX, 100 sets flags, and if they are set,
; JE will Jump you to DispMsg (to get "congratulations" message).
JMP SkipMsg ; Jump to the SkipMsg label (so you don't see the "congratulations" message).
DispMsg: ; If BX = 100, you JE here.
MOV AH, 09H ; Displays the message stored in the defined byte "Finished"
MOV DX, OFFSET Finished
INT 21H
SkipMsg: ; If BX != 100, you JMP here.
MOV AL, 0h ; Op code to exit to DOS from the assembler.
MOV AH, 4CH
INT 21H
MAIN ENDP
END MAIN
I hope it helps. I did the basic loop, so you can do the other bits of your code (and I don't know C++, lol). Good luck! It's hard, but kind of fun at the same time (at least for me).
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