</code></pre></li></ul></li><li><strong>Header include organization:</strong> Example for file ClassName.cpp :<ol><li>Corresponding header: ClassName.h </li><li>System C/POSIX Headers <em>e.g.</em> unistd.h, sys/ipc.h</li><li>C++ versions of system C headers <em>e.g.</em> cstdlib, cstring</li><li>System C++ headers <em>e.g.</em> vector, map</li><li>Other library headers <em>e.g.</em> boost, zfp, bzip2, thrust</li><li>Other headers from this library <em>e.g</em>"adiosFunctions.h"</li></ol><ul><li>Example:</li></ul><ol><li><ul><li><prestyle="border: 0;"><code> #include "ClassName.h"
</code></pre></li><li><prestyle="border: 0;"><code>#include <unistd.h> // write, close
</code></pre></li><li><prestyle="border: 0;"><code>#include <unistd.h> // write, close
</code></pre></li></ul></li></ol></li><li><strong>Include guards:</strong> all headers must have include guards to prevents name conflict. These are place right after the license and at the end of the file. The adopted format includes the relative path in ADIOS. For example, file adios2/engine/bp/BPFileWriter.h will contain the following include guards:<ol><li><ul><li><prestyle="border: 0;"><code>