Little Man computer problem

What exactly is confusing you about this?

It sounds quite simple. Create two inputs for your variables and store them in memory.

You could then take your Y value away from your X value, then branch if(the result is > 1) and output the numbers accordingly.

E.G.

X = 20
Y = 19

20 - 19 = 1
X is exactly 1 > Y

If X = 21
Y = 22

21 - 22
X is not exactly 1 > Y

Reply 2

OP

yes I know but i am new to little man computer and so i don't know how to implement it into lmc code. I only know branch if zero and branch always. I don't know how to do if the value is > or < something.

Reply 3

Original post by Spazum

yes I know but i am new to little man computer and so i don't know how to implement it into lmc code. I only know branch if zero and branch always. I don't know how to do if the value is > or < something.

Unsure of the exact syntax for your language. Do you mind sending me a picture of the syntax or the program name and I'll go write it up for you now.

Reply 4

OP

Sorry about the pic, im having trouble with the print screen function. feel free to delete and add code. :smile:

Reply 5

Original post by Spazum

Sorry about the pic, im having trouble with the print screen function. feel free to delete and add code. :smile:

Pssh looks like a nightmare man.

Here's what I'd say.

You could go for the same method I just described.

Ask user for input Y (more efficient this way first)
Store input y somewhere
Ask user for input X (no need to store)
Subtract Y (using memory location)
sub dat 1 (subtract the decimal value one)
then use branch if zero

The only way the number can equal zero is if X is exactly 1 > Y

Reply 6

OP

Original post by luciferhf

Pssh looks like a nightmare man.

Here's what I'd say.

You could go for the same method I just described.

Ask user for input Y (more efficient this way first)
Store input y somewhere
Ask user for input X (no need to store)
Subtract Y (using memory location)
sub dat 1 (subtract the decimal value one)
then use branch if zero

The only way the number can equal zero is if X is exactly 1 > Y

How would I tell it to print 11 or 22. i don't know how to do if functions. IMG_20170524_211637 (1).jpg

Reply 7

OP

IMG_20170524_222030.jpg562.3KB

how do i do an if statement to tell it to print 11 or 22

Reply 8

Original post by Spazum

how do i do an if statement to tell it to print 11 or 22

You could just load a number into the accumulator to represent a print.

Reply 9

OP

Original post by luciferhf

You could just load a number into the accumulator to represent a print.

INP
Y STA 99
INP
X STA 98
SUB Y
loop SUB Y
BRZ
OUT 11
HLT

why does it output -792?

Reply 10

Original post by Spazum

INP
Y STA 99
INP
X STA 98
SUB Y
loop SUB Y
BRZ
OUT 11
HLT

why does it output -792?

Looks like you have your loop with the SUB Y! Think you should have a quick look at a Youtube video to get a quick idea of how loops work in LMC.

Reply 11

OP