C preprocessor: Difference between revisions

A code block may be commented out to delete it from the program, however nesting deleted fragments may reduce legibility with C++ style comments, and C comments do not nest at all.

A better solution is to wrap the code in and #if 0-#endif block, where the conditional 0 means false :

print("memory state: ");

print(mem->state);

print("\nallocated blocks: ");

print(mem->allocs);

Many editors, like [[VIm]] have by default syntax highlighting rules that treat such #if 0-#endif blocks as comments.

The #if-#endif directives must be balanced, single-quotes characters must balance etc. so for deleting non-code text use comments instead.