Please help me to find where is wrong

[vivivo]

  I have spent several hours to find where the code wrong, I failed. I don't know how to find it,so i come here for help, forgive my poor English.Thanks!

[ybakos]

First, you can simplify some of your syntax. Instead of:

a[0..15] just use a. Since x is 16-bit, and the Mux16's a is 16-bits, you can just say a=x. Example:
Mux16(a=x, b=false, sel=zx, out=x1);

You also misspelled false. (flase).

I also believe the pins 1out, 0out, etc should be corrected to out1, and out0. Don't start the pin names with a number. (I could be wrong about this.)

You might have some flaws in the design. I strongly recommend drawing the ALU on paper first, to work out your design. It's fun!

[cadet1620]

Your solution is logically correct.

After fixing the syntax problems ybakos mentioned, please edit your post to remove the HDL. We want students to develop their own solutions.

--Mark

[vivivo]

Thank you so much for such useful advise ,I appreciate for reply so fast and serious attitude.Thanks ！

[vivivo]

I'm sorry,the post have been edited now,thank you.

[cadet1620]

No need to apologize, it is OK to post code to get help. I just remind posters to edit their posts after their problem is solved.

Welcome to Nand2Tetris. I hope you enjoy the course!

--Mark