Issue for running code on raspberry pico

[TAOFOR4]

Hi,

I am totally new in this area, so my question might be stupid.

I am trying to run some c code into wasm and run them in pico through wasm3. I write a 'Hello World!' c code. But when it runs on pico the screen shows:

I guess it might be the 'printf' in c code is not accepted. But then how can I print out things? ( I wanna compare the performance between natural c code and wasm on pico later so directly print from wasm3 main.c file maybe not a good choice?

Also, when I tried to run bubble sort code, one of the arguments is array which can't be passed through m3_CallV directly so I have no idea how to run this function in main.c file inside the wasm3.

Thank you!