assignment 3 main.s/read_matrix

[brandon]

# Question templates

SFU ID: 301358970

Github username: bla118

Github: Link to github repo (your assignment repos are private so these links are only accessible to TAs and Instructor)

https://github.com/CMPT-295-SFU/assignment-3-bla118

Line and file: main.s, read_matrix.s

Expected behavior:

Observed behavior: Exited error code 1

Question: When testing main.s, calling read_matrix returns an error in the freed parts. I tested read_matrix and it worked. Need help figuring out whether main.s or read_matrix.s is wrong. Thanks

[ali sedaghati]

In main.s, you're moving a1 to s4. It means that, at first, (*s4) is argv[0], which is the program name. So, you have to add an offset to reach other input arguments.

[brandon]

Ok I have fixed that but it's still returning an error. Starting to think there's something wrong with my read_matrix.s..

[ali sedaghati]

In main.s, in line 75 you're overwriting s4.
Using print_int_array is helpful for printing matrices and finding the reason for the bug.  For example, by inserting print_int_array after reading each input matrix, you can find out that the first two are okay but the third one is causing the error.

[brandon]

Hi Ali, 

I have fixed the register for getting argv[] but the 3rd read still isn't working. Is there something else I'm missing? Thanks

[ali sedaghati]

Put a screenshot of command and error here. Make sure that you're printing each step's result to make debugging easier.