what are macros?what are its advantages and disadvantages in
c language?
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Answer Posted / deepedra kushwaha
A macro is a name given to a block of C statements as a
pre-processor directive. Being a pre-processor, the block of
code is communicated to the compiler before entering into
the actual coding (main () function). A macro is defined
with the preprocessor directive, #define.
The advantage of using macro is the execution speed of the
program fragment. When the actual code snippet is to be
used, it can be substituted by the name of the macro. The
same block of statements, on the other hand, need to be
repeatedly hard coded as and when required.
The disadvantage of the macro is the size of the program.
The reason is, the pre-processor will replace all the macros
in the program by its real definition prior to the
compilation process of the program.
Describe the advantages of using macro.
A macro is a name given to a block of the code which can be
substituted where the code snippet is to be used for more
than once.
- The speed of the execution of the program is the major
advantage of using a macro.
- It saves a lot of time that is spent by the compiler for
invoking / calling the functions.
- It reduces the length of the program.
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