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What is a Macro in C/C++ and what is its disadvantage?

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What is a Macro in C/C++ and what is its disadvantage?
posted Jan 21, 2015 by Alwaz

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Best answer

Macros are the identifiers that represent statements or expressions in other words macros are fragment of code which is been given a name.

define directive is used to define a macro.

Example, we have define a macro i.e SQUARE(x) x*x.

Here the macro determines the square of the given number. Macro Declaration: #define name text

Disadvantage of using Macro:

The major disadvantage associated with the macro is :
1. When a macro is invoked no type checking is performed.
Therefore it is important to declare a macro coreectly so that it gives a correct answer whenever it is called inside the program.

answer Jan 22, 2015 by Mohammed Hussain
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+1 vote

Let me put some context of my curiosity -
One of the mysterious activities in Programming Language design is the aspect of standard libraries and there have been talk of "modernizing" standard libraries to meet up to the requirements:
i) Parallelism(multi-core)
ii) Searching
iii) Big data
iv) GUI lacking in C & C++
v) The top N widely used algorithms

Now as a developer I am interested to know, Is there a precise formula for the evolution of Standard Libraries and measure its effectiveness?