Q5 What is Miscellaneous Directives. Types of miscellaneous directives (#undef and #pragma)?

Program: 149

These two pre-processor directives are not commonly used pre-processors.

#undef

It is used to convert a defined macro name to undefined.

For example: # undef PENTIUM

Output:

 Main function

#pragma

We use it for assigning execution order to functions. It can run a function before main and before termination of program.

For example:

# pragma startup fun1

#pragma exit fun2

Output:

 
 ABC Function
 Main Function
 XYZ Function