The C preprocessor, often known as cpp, is a macro processor that is used automatically by the C compiler to transform your program before compilation. filexlib. Basic Macro processor Functions. •. Macro definition, invocation, and expansion. •. Assembler Directives for Macro definition. – MACRO and MEND. What is macro preprocessor in system software? Macros allow you to write commonly used PL/I code in a way that hides implementation details and the data that is manipulated and exposes only the operations . In contrast with a generalized subroutine, macros allow generation of only the code that is needed for each individual use.
: body. : MEND o Body: the statements that will be generated as the expansion of the macro. 4.1 Basic Macro Processor Functions: Macro Definition and
A macro represents a commonly used group of statements in the source programming language. The macro processor replaces each macro instruction with the.
What are the four basic tasks of macro processor? Procedure DEFINE to process a macro definition and enter symbols and macro in NAMTAB and DEFTAB. Procedure EXPAND to enter arguments to ARGTAB and expand the macro. Procedure GETLINE to read a line from source file or DEFTAB. LEVEL to record the level of macro definition for nested macros.
A macro facility is an add-on piece of system software, a convenience for the programmer, to facilitate production of multiple lines of commonly occurring code
user header file, the macro name should not begin with `_'. In a system header file, this name should begin with `__' to avoid conflicts with user programs. Macro preprocessor. Macros allow you to write commonly used PL/I code in a way that hides implementation details and the data that is manipulated and
What are the types of macro processor? Macro Assembler : It performs expansion of each macro call in a program into a sequence of assembly language statements and also assembles the resultant assembly language program. Macro pre-processor: It only processes the macro call .
from its body, this is called macro expansion.” The name of preprocessor variable, which is also preceded by the character „&‟.
What is the difference between macros and macro processors? a macro processor because it allows you to define macros, which are brief abbreviations for longer constructs.
What is the difference between macros and macro processors? a macro processor because it allows you to define macros, which are brief abbreviations for longer constructs.
○ A macro definition consists of. A macro prototype statement. One or more model statements. Macro preprocessor statements. ○ The macro

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