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

Question

#define MY_STRUCT
typedef struct{ 
...
... 
} my_struct;

Above code is giving me error (MY_STRUCT) is not working as expected, Looks that some silly mistake, please point out as I have wasted many hours?

Sorry for hiding my identity?

Answer 1

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.