![]() Operator # stringize the argument: #define str(x) #x (like in your question)įunction macro definitions accept two special operators (# and #) You can use any other previously #define in your macro. Usefull pre-processor keyword: #define, #undef, #else, #elif, #ifdef, #ifndef, #if That means that you cannot use a define that wasn't defined previously. The defines are "defined" in the order they are included/read. I'll try to keep it as simple as possible. One, but all pragma unary operator expressions within it are thenīut for your personal information, here are some simplified rules about macros that might help you (it's out of scope, but will probably help you in the future). Is not processed as a preprocessing directive even if it resembles The resulting completely macro-replaced preprocessing token sequence (re)examined in contexts in which that macro name preprocessing token ![]() Longer available for further replacement even if they are later These nonreplaced macro name preprocessing tokens are no Replacements encounter the name of the macro being replaced, it is not Preprocessing tokens), it is not replaced. The replacement list (not including the rest of the source file's If the name of the macro being replaced is found during this scan of Source file, for more macro names to replace. Is rescanned, along with all subsequent preprocessing tokens of the Then, the resulting preprocessing token sequence # and # processing has taken place, all placemarker preprocessing tokens are removed. The OP might not benefit from this, but others might be interested.Ħ.10.3.4 Rescanning and further replacementĪfter all parameters in the replacement list have been substituted and If you find yourself doing the same thing over and over again when using a certain program, you may want to simplify the process by recording a macro.The answer is "yes", and two other people have correctly said so.Īs for why the answer is yes, the gory details are in the C standard, section 6.10.3.4, "Rescanning and further replacement". Regardless of what they are called, macros can save you a lot of time by automating repetitive tasks. For example, Photoshop allows users to record changes made to an image and saves the series of steps as an "action." These actions can then by applied to other images. However, not all programs refer to the automated commands as macros. While Word and Excel both make it easy to create custom macros, many other programs allow users to create macros as well. A Microsoft Excel user might record a macro to format the data in the selected column of a spreadsheet. For example, a user might record a macro for Microsoft Word that inserts his entire address when he presses a custom key combination. These scripts are usually run within programs and can often be created by the user. For a list of keyboard shortcuts available for Mac and Windows, view the pages below:Ī macro can also be a small program, or script, that automates common tasks. ![]() The term "macro" is often used synonymously with " keyboard shortcut." Keyboard shortcuts are key combinations that perform commands, such as saving a file, closing a window, or copying and pasting data. Macro has two computer-related definitions, both of which involve making your computer experience more efficient.
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