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

Implement a binomial tree class, a) Implement a binomial tree class with a ...

a) Implement a binomial tree class with a method that calculates the value of an option passed in to the class. The binomial tree should not rely on specific features of the differ

What is the role of && operator in a program code, What is the role of && o...

What is the role of && operator in a program code? - && is also referred to as AND operator. - When this operator is used, all conditions specified should be TRUE before nex

Algorithm, Write algorithms to implement the insertion and deletion operati...

Write algorithms to implement the insertion and deletion operations.

Program to calculate pie, This problem familiarizes you with using random n...

This problem familiarizes you with using random numbers in C++. The program is to compute a good approximation of π using a simulation method called "Monte Carlo". The following fi

In p = new fred(), Q: In p = new Fred(), does the Fred memory "leak" if  Fr...

Q: In p = new Fred(), does the Fred memory "leak" if  Fred constructor throws an exception? A: No.         If an exception take place during the Fred constructor of p = new F

Explain formatted input output with file pointer, Explain Formatted Input O...

Explain Formatted Input Output with File Pointer? Likewise there are equivalents to the functions scanf and printf which write or read data to files. These are called fscanf a

C++ and matlab, ">http://www.ee.nmt.edu/~erives/289_F12/EE289_Takehome_2.p...

">http://www.ee.nmt.edu/~erives/289_F12/EE289_Takehome_2.pdf http://www.ee.nmt.edu/~erives/289_F12/Takehome2_maze.GIF

Define statements to define the constants, the problem description. The ...

the problem description. The order of the C Program should be as follows: Variables and constants Use #define statements to define the constants. Use arr

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