Welcome to this forum!
Which version of Code::Blocks? Which Compiler?
Why to use a file named HelloWorld.cpp or Hello_World.cpp. :D
Ah yes, sorry.
Compiler: Default (i think this is the GNU CCC Compiler or something like that)
Version: 8.02
I used Helloworld.cpp as a test file to see if it would work.
C:\Program Files\CodeBlocks\Hello world.cpp|1|no include path in which to search for iostream|
C:\Program Files\CodeBlocks\Hello world.cpp||In function `int main()':|
C:\Program Files\CodeBlocks\Hello world.cpp|5|error: `cout' was not declared in this scope|
||=== Build finished: 2 errors, 0 warnings ===|