What syntax differences should I remember when shifting from Turbo C to Code::Blocks for C programming?

C is C. What ever the IDE you are using. There is no syntax differences.

Which doesn't mean that shifting from one to another is easy. You'll certainly have some different way to describe the project (list of .c and .h files, and their relations; location of standard libraries and header files; etc).

There also will probably be some differences between the error messages, since it will not be the same compiler (Turbo C provides its own compiler. CodeBlocks uses an external one.

Maybe even, there will be some errors that are tolerated on one and not another (but there shouldn't ; and there won't be for codes of your level - don't take it personnaly, but people asking this kind of question don't use subtil pragma or __attribute__).

Anyway, even that, we can't tell, since this is not related at all with the IDE, but with the compiler. And you didn't say which compiler you plan to use.

C is C. Your question is about syntax. And syntaxically speaking, there is no difference between C in one IDE and C in another IDE.

Syntax - no differences

C is C, as defined in Kernigan and Ritchie

What Turbo C may have is some statement .builtin functions

That in any other implementation would be a library

or possibly compiler directives - for small or large x86 implementations.

in early C and other programs

some compilers for Windows/PC added memory PUT and GET calls..

which C does not have.. is accesses it in more classical library calls.

expect that Code::Blocks will be Classic C.

Talking of which... Brian Kernigan..

https://www.youtube.com/watch?v=de2Hsvxaf8M

and more.. at Computerphile

https://www.youtube.com/watch?v=Sg4U4r_AgJU

Also tell the difference in errors shown. Thanks