I'm making a program to practice getting input and arithmetic, and when storing the user's input in a buffer and then doing arithmetic with them, I get error A2070 - invalid instruction operands. Here is my code:
include C:\masm32\include\masm32rt.inc
.data
msg db "Enter a number: ", 0
msg2 db "Enter another number: ",13,10,0
msg3 db "Your numbers: ", 13,10,0
msg4 db "Added = ", 0
spacer db " ",13,10,0
msg5 db "Subtracted = ", 0
msg6 db "Multiplied = ", 0
ansadd sdword 0
anstake sdword 0
ansmul sdword 0
.data?
buffer1 db 12 dup(?)
buffer2 db 12 dup(?)
.code
start:
lea eax, msg
push eax
call StdOut
push 100
push buffer1 ;line 29
call StdIn
xor eax, eax
lea eax, msg2
push eax
call StdOut
push 100
push buffer2 ;line 39
call StdIn
xor eax, eax
lea eax, buffer1
lea ebx, buffer2
add eax, ebx
push eax
pop ansadd
lea eax, buffer1
lea ebx, buffer2
sub eax, ebx
push eax
pop anstake
xor ebx, ebx
lea eax, buffer1
lea ecx, buffer2
mul eax
push eax
pop ansmul
xor eax, eax
xor ebx, ebx
xor ecx, ecx
lea eax, msg3
push eax
call StdOut
lea eax, msg4
push eax
call StdOut
lea eax, ansadd
push eax
call StdOut
lea eax, msg5
push eax
call StdOut
lea eax, anstake
push eax
call StdOut
lea eax, msg6
push eax
call StdOut
lea eax, ansmul
push eax
call StdOut
push 0
call ExitProcess
END start
Here is the feedback from MASM's ml.exe:
test.asm(29) - A2070 - Invalid instruction operands.
test.asm(39) - A2070 - Invalid instruction operands.
What is wrong with the variables? I suspect it might be the variable declaration.
Any help would be appreciated.
You should push the address of buffer1 - do it exactly as you push the addresses of mgs and mgs2...
Instead of
push buffer1
do
lea eax, buffer1
push eax