Using memcpy() to write data to structure

Question

https://code.sololearn.com/c2MmXpa5pboj/?ref=app

Can't tell why this isn't working. Looks like I didn't use memcpy function right. I get "0" printed.

Answer 1

You must have bad luck if it prints 0. Good luck would crash the program so you know something is wrong because what you're doing is undefined behavior because you're writing data that is outside the structure.

You're trying to copy a variable that is 4 bytes long to a 1 byte variable, thereby overwriting 3 bytes of who knows what.
Perhaps your val should be a float instead of an unsigned char?

Answer 2

Thanks... Changed unsigned char type to float and removed castings, the code worked.