Can I use code block compiler to practice C++ in the computer?

Answer 1

of u can and u can also try terminal compiler

Answer 2

of course you can

Answer 3

that is the place you can practice

Answer 4

Sure!

Answer 5

CodeBlocks is not a compiler!
It's an IDE which integrates with a compiler.

I think on Windows it ships with compiler (bundled) so you should be fine.