Explain the #undef directive, C/C++ Programming

Assignment Help:

The #undef Directive

This directive undefines a previously explained macro. For, example the following will give an error since PI is undefined.

                #define PI 3.14285

                void main()

                 {

                                cout<< PI;                                           // no error here

                  # undef PI;

 

cout << PI;                          // error after undef.

                 }

 


Related Discussions:- Explain the #undef directive

Array, how to pass array

how to pass array

Matrix transposition cipher, write a C rpogram that can display the transpo...

write a C rpogram that can display the transpose form of a ciphertext matrix.Prompt users to provide row and coloumn number of matrix.Then user will input plaintext and the program

Define the multi dimensional arrays, Define the Multi Dimensional Arrays? ...

Define the Multi Dimensional Arrays? Consequently far we have considered arrays with only one dimension. It is as well possible to define an array which is having a 2-dimension

Compiler design limiting instruction, Ravi is a newbie to the programming a...

Ravi is a newbie to the programming and while learning the programming language he came to know the following rules: · Each program must start with ''''{'''' and end with ''''}

#program, Ask question #Minimum 100 words accepted program for polishin...

Ask question #Minimum 100 words accepted program for polishing jewels#

Static optimality theorem, Question 1 Describe the following with respect ...

Question 1 Describe the following with respect to pointers in C language- Pointers and Arrays Usage of Pointers in functions Write programs in C to demonstrate the

What is the difference between structure and class, What is the difference ...

What is the difference between structure and class? - Members of structures are public while those of a class are private. - Classes provide data hiding while structures don

PADOVAN STRING, # c pragram TO count the number of occurances of the string...

# c pragram TO count the number of occurances of the string in nth padovan''s string program in java // aakash , suraj , prem sasi kumar kamaraj college program 1 : pa

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd