CodeBlocks stable is old, and if you're using it, you should get the nightly builds (instructions about how to do that in codeblock's forum).

More on topic. Codeblocks can work with both Microsoft's compiler and GCC. If you're using (or trying to) GCC, in Linux you should install it first with your package manager of preference, in Windows you should download and install MinGW.

Select the appropriate compiler in CodeBlocks and try again (both Linux's GCC and MinGW's GCC for Windows appear as "GCC" on the dropdown list of compilers). You may have to select the compiler settings from the project instead of just using the global settings for the compiler (specially if you're trying to compile an older project that may have different paths for the compiler, cpps, etc).

CodeBlocks stable is old, and if you're using it, you should get the nightly builds (instructions about how to do that in codeblock's forum).

More on topic. Codeblocks can work with both Microsoft's compiler and GCC. If you're using (or trying to) GCC, in Linux you should install it first with your package manager of preference, in Windows you should download and install MinGW.

Select the appropriate compiler in CodeBlocks and try again. You may have to select the compiler settings from the project instead of just using the global settings for the compiler (specially if you're trying to compile an older project that may have different paths for the compiler, cpps, etc).