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How do you check if a macro is defined?
Inside of a C source file, you can use the #ifdef macro to check if a macro is defined.
Which one is known as conditional macro?
A conditional macro definition is a line of the form: target-list := macro = value. which assigns the given value to the indicated macro while make is processing the target named target-list and its dependencies. Note –
Can we define function in macro?
Macros that do so are called macro functions . To create a macro function, simply define a macro with a parameter that has whatever name you like, such as my_val . For example, one macro defined in the standard libraries is abs , which returns the absolute value of its parameter.
Which one of the following is conditional directive?
8.2 Conditional Compilation (#if, #ifdef, #ifndef, #else, #elif, #endif, and defined) Six directives are available to control conditional compilation. They delimit blocks of program text that are compiled only if a specified condition is true. These directives can be nested.
What is the use of Ifdef?
In the C Programming Language, the #ifdef directive allows for conditional compilation. The preprocessor determines if the provided macro exists before including the subsequent code in the compilation process.
What is the difference between Ifdef and if defined?
The difference between the two is that #ifdef can only use a single condition, while #if defined(NAME) can do compound conditionals.
When to use% let statements inside of a macro?
When you use %let statements inside of a macro, the variables default to local scope. That is, they only exist inside the macro. To remedy that add a %global statement inside the macro. This tells SAS that the macro variables number_text and number_text_2 should be accessible outside of the macro, which should fix your problem.
How to execute a macro based on a cell value?
Right click the sheet tab that you want to execute the macro based on a cell value, and then choose View Code from the context menu, and in the opened Microsoft Visual Basic for applications window, copy and paste the following code into the blank Module: VBA code: Run macro if cell value is greater or less than:
How to conditionally use a macro variable in SAS?
I have a SAS project (EGv7.1) that allows the user to specify a value on the first line. Then, other processes are invoked based on the value specified. One of these is that some other macro variables are assigned. Below is what I have, and it does not seem to be working.
How to apply conditional formatting in Excel VBA?
Use FormatConditions.Add FormatConditions is a property of the Range object. Add has the following parameters. The FormatConditions collection can only hold 3 FormatConditions. The Type parameter has the following options. For this type of condition use xlCellValue.