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

Determine the capacitor voltage by c program, Write a program to determine ...

Write a program to determine V c for a given value of time (t)   #include stdio.h #include math.h void main() {      char prompt;   float vs,cr,t,vc;   /* input time */

Big M method, I Want a answer for solving the big M method in the topic of ...

I Want a answer for solving the big M method in the topic of simplex method...

When i develop a destructor, When I develop a destructor, do I require to e...

When I develop a destructor, do I require to explicitly call the destructors for my member objects?

Algorthrithm for c programe, Need algorithm for c programe #Minimum 100 wor...

Need algorithm for c programe #Minimum 100 words accepted#

Private member functions, P r i va t e Member Functions: A private...

P r i va t e Member Functions: A private member functions can be called by the members of the same class.  Consider the following example.   c l a ss sample

Write function that take array as argument, Write a function that takes an ...

Write a function that takes an array as the argument and returns the second largest element. Bonus (+5): Write a function that takes an array and a number n as arguments and return

What do you signify by stack unwinding?, A: this is a procedure during exce...

A: this is a procedure during exception handling while the destructor is called for all local objects in the stack among the place where the exception was thrown & where this is ca

Palindrome, A palindrome is a string that reads the same from both the ends...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

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